Solar System: Things To Know This Week

NASA Spotlight: Astronaut Mike Hopkins

Michael S. Hopkins was selected by NASA as an astronaut in 2009. The Missouri native is currently the Crew-1 mission commander for NASA’s next SpaceX launch to the International Space Station on Nov. 14, 2020. Hopkin’s Crew-1 mission will mark the first-ever crew rotation flight of a U.S. commercial spacecraft with astronauts on board, and it secures the U.S.’s ability to launch humans into space from American soil once again.  Previously, Hopkins was member of the Expedition 37/38 crew and has logged 166 days in space. During his stay aboard the station, he conducted two spacewalks totaling 12 hours and 58 minutes to change out a degraded pump module. He holds a Bachelor of Science in Aerospace Engineering from the University of Illinois and a Master of Science in Aerospace Engineering. 

He took some time from being a NASA astronaut to answer questions about his life and career! Enjoy:

What do you hope people think about when you launch?

I hope people are thinking about the fact that we’re starting a new era in human spaceflight. We’re re-opening human launch capability to U.S. soil again, but it’s not just that. We’re opening low-Earth orbit and the International Space Station with commercial companies. It’s a lot different than what we’ve done in the past. I hope people realize this isn’t just another launch – this is something a lot bigger. Hopefully it’s setting the stage, one of those first steps to getting us to the Moon and on to Mars.

You served in the U.S. Air Force as a flight test engineer. What does that entail?

First off, just like being an astronaut, it involves a lot of training when you first get started. I went to the U.S. Air Force Test Pilot School and spent a year in training and just learning how to be a flight test engineer. It was one of the most challenging years I’ve ever had, but also one of the more rewarding years. What it means afterwards is, you are basically testing new vehicles or new systems that are going on aircraft. You are testing them before they get handed over to the operational fleet and squadrons. You want to make sure that these capabilities are safe, and that they meet requirements. As a flight test engineer, I would help design the test. I would then get the opportunity to go and fly and execute the test and collect the data, then do the analysis, then write the final reports and give those conclusions on whether this particular vehicle or system was ready to go.

What is one piece of life advice you wish somebody had told you when you were younger? 

A common theme for me is to just have patience. Enjoy the ride along the way. I think I tend to be pretty high intensity on things and looking back, I think things happen when they’re supposed to happen, and sometimes that doesn’t necessarily agree with when you think it should happen. So for me, someone saying, “Just be patient Mike, it’s all going to happen when it’s supposed to,” would be really good advice.

Is there a particular science experiment you enjoyed working on the most while aboard the space station?

There’s a lot of experiments I had the opportunity to participate in, but the ones in particular I liked were ones where I got to interact directly with the folks that designed the experiment. One thing I enjoyed was a fluid experiment called Capillary Flow Experiment, or CFE. I got to work directly with the principal investigators on the ground as I executed that experiment. What made it nice was getting to hear their excitement as you were letting them know what was happening in real time and getting to hear their voices as they got excited about the results. It’s just a lot of fun.

Space is a risky business. Why do it?

I think most of us when we think about whatever it is we do, we don’t think of it in those terms. Space is risky, yes, but there’s a lot of other risky jobs out there. Whether it’s in the military, farming, jobs that involve heavy machinery or dangerous equipment… there’s all kinds of jobs that entail risk. Why do it? You do it because it appeals to you. You do it because it’s what gets you excited. It just feels right. We all have to go through a point in our lives where we figure out what we want to do and what we want to be. Sometimes we have to make decisions based on factors that maybe wouldn’t lead you down that choice if you had everything that you wanted, but in this particular case for me, it’s exactly where I want to be. From a risk standpoint, I don’t think of it in those terms.

Can you describe your crew mate Soichi Noguchi in one sentence?

There are many facets to Soichi Noguchi. I’m thinking about the movie Shrek. He has many layers! He’s very talented. He’s very well-thought. He’s very funny. He’s very caring. He’s very sensitive to other people’s needs and desires. He’s a dedicated family man. I could go on and on and on… so maybe like an onion – full of layers!

Star Trek or Star Wars?

I love them both. But can I say Firefly? There’s a TV series out there called Firefly. It lasted one season – kind of a space cowboy-type show. They did have a movie, Serenity, that was made as well. But anyway, I love both Star Wars and Star Trek. We’ve really enjoyed The Mandalorian. I mean who doesn’t love Baby Yoda right? It’s all fun.

How many times did you apply to be an astronaut? Did you learn anything on your last attempt? 

I tried four times over the course of 13 years. My first three attempts, I didn’t even have references checked or interviews or anything. Remember what we talked about earlier, about patience? For my fourth attempt, the fact is, it happened when it was supposed to happen. I didn’t realize it at the time. I would have loved to have been picked on my first attempt like anybody would think, but at the same time, because I didn’t get picked right away, my family had some amazing experiences throughout my Air Force career. That includes living in Canada, living overseas in Italy, and having an opportunity to work at the Pentagon. All of those helped shape me and grow my experience in ways that I think helped me be a better astronaut.

Can you share your favorite photo or video that you took in space?

One of my favorite pictures was a picture inside the station at night when all of the lights were out. You can see the glow of all of the little LEDs and computers and things that stay on even when you turn off the overhead lights. You see this glow on station. It’s really one of my favorite times because the picture doesn’t capture it all. I wish you could hear it as well. I like to think of the station in some sense as being alive. It’s at that time of night when everybody else is in their crew quarters in bed and the lights are out that you feel it. You feel the rhythm, you feel the heartbeat of the station, you see it in the glow of those lights – that heartbeat is what’s keeping you alive while you’re up there. That picture goes a small way of trying to capture that, but I think it’s a special time from up there.

What personal items did you decide to pack for launch and why? 

My wedding bands. I’m also taking up pilot wings for my son. He wants to be a pilot so if he succeeds with that, I’ll be able to give him his pilot wings. Last time, I took one of the Purple Hearts of a very close friend. He was a Marine in World War II who earned it after his service in the Pacific.

Thank you for your time, Mike, and good luck on your historic mission! Get to know a bit more about Mike and his Crew-1 crew mates Victor Glover, Soichi Noguchi, and Shannon Walker in the video above.

Watch LIVE launch coverage beginning at 3:30 p.m. EST on Nov. 14 HERE. 

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What dose it feel like being inside a space suit?

The suit weighs about 300 pounds. We are made neutrally buoyant in the pool, but over time we can become negatively buoyant. The suit can feel heavy, even the bearings can become stiff, so it can be difficult to operate in the suit. With practice and the help of a great spacewalk team, we can make a spacewalk look seamless.

Getting to Mars: A New Rocket for the Journey

Do you know what the structural backbone is of our new rocket, the Space Launch System? If you answered the core stage, give yourself a double thumbs up! Or better yet, have astronaut Scott Kelly do it!

We’re on a journey to Mars. For bolder missions to deep space, we need a big, powerful rocket like SLS to take astronauts in the Orion spacecraft to places we've never gone before. The core stage is a major part of that story, as it will house the fuel and avionics systems that will power and guide the rocket to those new destinations beyond Earth’s orbit. Here's how:

It's Big, and It's Fast.

The core stage will be the largest rocket stage ever built and is under construction right now at our Michoud Assembly Facility in New Orleans. It will stand at 212 feet tall and weigh more than 2.3 million pounds with propellant. That propellant is cryogenic liquid hydrogen and liquid oxygen that will feed the vehicle’s RS-25 engines. In just 8.5 minutes, the core stage will reach Mach 23, which is faster than 17,000 mph!

It's Smart.

Similar to a car, the rocket needs all the equipment necessary for the "drive" to deep space. The core stage will house the vehicle’s avionics, including flight computers, instrumentation, batteries, power handling, sensors and other electronics. That's a lot of brain power behind those orange-clad aluminum walls. *Fun fact: Orange is the color of the rocket's insulation.

It's a Five-Parter.

The core stage is made up of five parts. Starting from the bottom is the engine section, which will deliver the propellants to the four RS-25 engines. It also will house avionics to steer the engines, and be an attachment point for the two, five-segment solid rocket boosters. The engine section for the first SLS flight has completed welding and is in the final phases of manufacturing at Michoud.

Next up is the liquid hydrogen tank. It will hold 537,000 gallons of liquid hydrogen cooled to -423 degrees Fahrenheit. Right now, engineers are building the tank for the first SLS mission. It will look very similar to the qualification test article that just finished welding at Michoud. That's an impressive piece of rocket hardware!

The next part of the core stage is the intertank, which will join the propellant tanks. It has to be super strong because it is the attachment point for the boosters and absorbs most of the force when they fire 3.6 million pounds of thrust each. It's also a "think tank" of sorts, as it holds the SLS avionics and electronics. The intertank is even getting its own test structure at our Marshall Space Flight Center in Huntsville, Alabama.

And then there's the liquid oxygen tank. It will store 196,000 gallons of liquid oxygen cooled to -297 degrees. If you haven't done the math, that's 733,000 gallons of propellant for both tanks, which is enough to fill 63 large tanker trucks. Toot, toot. Beep, beep! A confidence version of the tank has finished welding at Michoud, and it's impressive. Just ask this guy.

The topper of the core stage is the forward skirt. Funny name, but serious hardware. It's home to the flight computers, cameras and avionics. The avionics system is being tested right now in a half-ring structure at the Marshall Center.

You can click here for more SLS core stage facts. We'll continue building, and see you at the launch pad for the first flight of SLS with Orion in 2018!

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Cosmic Piece of Pi!

Did you know that pi is involved nearly anywhere you look? We’re not talking about your favorite pastry! Pi (also written as the Greek letter 𝞹, or the number 3.14159...) is an irrational number, which means it can’t be written as a simple fraction like ½. It is the ratio of a circle’s circumference (the distance around its edge) to its diameter (the distance across it) and will always be the same number, regardless of the circle’s size. Here are some places you can find pi in the universe around us!

Our Transiting Exoplanet Survey Satellite, TESS, watches slices of the sky in its hunt for worlds outside our solar system — how many exoplanets are in its night-sky pie? Last July, TESS scientists created a mosaic of 208 images of the southern sky. At that time, it contained 29 confirmed and 1,000 possible exoplanets, and we’re still studying the data to find more. Since this awe-inspiring image is of the southern hemisphere (or half of a 3D circle), there will always be pi! Every slice contains something delicious for scientists to study.

Pi recently played a crucial role in new discoveries about Alpha Draconis, a well-studied pair of stars. After discovering these stars regularly eclipse each other, pi helped scientists learn more about them. Scientists detected the eclipses while monitoring the brightness of Alpha Draconis for periodic dips that could’ve been caused by planets passing between the star and us. Instead of a planet, though, researchers found that its smaller partner in crime was passing in between us and the larger star for about six hours at a time! 💫

Pi comes in handy as we learn more about these two stars. Knowing the percentage of the decrease in Alpha Draconis’ light and the formula for the area of a circle (A=𝞹r2 — or area equals pi times the square of the circle's radius), scientists can predict the sizes of both stars.  Because stars typically orbit in an elliptical (or oval) shape, pi also helps scientists use the detection of these eclipses to figure out the orbits of the two stars!

So far we’ve seen pi in many places! But it's also interesting to look at where pi can't be found! We mentioned earlier that many orbit calculations involve pi … but not every one does! Pi does not factor into calculations of hyperbolic orbits — orbits that aren't complete, or don't return to where they started — the same way that it does with elliptical orbits! This is most commonly seen with comets. While many comets orbit normally in our solar system, some oddballs just pass through, like the interstellar ‘Oumuamua that zipped passed us in 2017. ☄️

Perhaps the most popular place you may find pi is in the shape of a typical pie! While NASA’s Fermi Gamma-ray Space Telescope studies gamma-rays, and not blueberries, we think this cool Fermi pie is worth sharing for Pi Day!

Find more ways scientists look up at the night sky and use pi here. And now, don’t be irrational, and go have some pi(e)! 🥧

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Carbon and Our Changing Climate

Carbon is the backbone of life on Earth. We are made of carbon, we eat carbon and our civilizations are built on carbon. We need carbon, but that need is also entwined with one of the most serious problems facing us today: global climate change.

Forged in the heart of aging stars, carbon is the fourth most abundant element in the Universe. Most of Earth’s carbon – about 65,500 billion metric tons – is stored in rocks. The rest is in the ocean, atmosphere, plants, soil and fossil fuels.

Over the long term, the carbon cycle seems to maintain a balance that prevents all of Earth’s carbon from entering the atmosphere, or from being stored entirely in rocks. This balance helps keep Earth’s temperature relatively stable, like a thermostat.

Today, changes in the carbon cycle are happening because of people. We disrupt the cycle by burning fossil fuels and clearing land. Our Orbiting Carbon Observatory-2 (OCO-2) satellite is providing our first detailed, global measurements of CO2 in the atmosphere at the Earth’s surface. OCO-2 recently released its first full year of data, critical to analyzing the annual CO2 concentrations in the atmosphere.

The above animation shows carbon dioxide released from two different sources: fires and massive urban centers known as megacities. The animation covers a five day period in June 2006. The model is based on real emission data and is then set to run so that scientists can observe how greenhouse gas behaves once it has been emitted.

All of this extra carbon needs to go somewhere. So far, land plants and the ocean have taken up about 55 percent of the extra carbon people have put into the atmosphere while about 45 percent has stayed in the atmosphere. The below animation shows the average 12-month cycle of all plant life on Earth (on land and in the ocean). Eventually, the land and oceans will take up most of the extra carbon dioxide, but as much as 20 percent may remain in the atmosphere for many thousands of years.

Excess carbon in the atmosphere warms the planet and helps plants on land grow more. Excess carbon in the ocean makes the water more acidic, putting marine life in danger. Forest and other land ecosystems are also changing in response to a warmer world. Some ecosystems -- such as thawing permafrost in the Arctic and fire-prone forests -- could begin emitting more carbon than they currently absorb. 

To learn more about NASA’s efforts to better understand the carbon and climate challenge, visit: http://www.nasa.gov/carbonclimate/.

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A Hitchhiker’s Ride to Space

This month, we are set to launch the latest weather satellite from the National Oceanic and Atmospheric Administration (NOAA). The Joint Polar Satellite System-1, or JPSS-1, satellite will provide essential data for timely and accurate weather forecasts and for tracking environmental events such as forest fires and droughts.

Solar System: 5 Things To Know This Week

Our solar system is huge, so let us break it down for you. Here are 5 things to know this week: 

1. You Call the Shots

This July, when the Juno mission arrives at Jupiter, it will eye the massive planet with JunoCam. What adds extra interest to this mission is that the public is invited to help Juno scientists choose which images JunoCam will take. Now is the time to get involved.

2. Dawn Delivers

We've seen several images now from the Dawn spacecraft's new, close orbit around Ceres—and they don't disappoint. Exquisitely detailed photos of the dwarf planet reveal craters, cliffs, fractures, canyons and bright spots in many locations. "Everywhere we look in these new low-altitude observations, we see amazing landforms that speak to the unique character of this most amazing world," said the mission's principal investigator.

3. Remembering the Visit to a Sideways World

Jan. 24 is the 30th anniversary of Voyager 2's Uranus flyby. The seventh planet is notable for the extreme tilt of its axis, its lacy ring system and its large family of moons—10 of which were discovered thanks to Voyager's close encounter. In fact, we learned much of what we know about the Uranian system during those few days in 1986.

4. A Decade in the Deep

The New Horizons spacecraft left Earth 10 years ago this week. Its long voyage into deep space is, even now, transforming our understanding of the outer solar system. New data and pictures from the Pluto flyby are still streaming down from the spacecraft. Pending the approval of an extended mission, New Horizons is en route to a 2019 rendezvous with a small, unexplored world in the distant Kuiper Belt.

5. Power at a Distance

Space exploration helped drive the development of practical solar cells, and now solar power has gone farther than ever before. Last week, NASA's Juno spacecraft broke the record for the most distant solar-powered craft when it passed a distance of 493 million miles (793 million kilometers) from the sun. The four-ton Juno spacecraft draws energy from three 30-foot-long (9-meter) solar arrays festooned with 18,698 individual cells.

Want to learn more? Read our full list of the 10 things to know this week about the solar system HERE. 

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The 2017 Atlantic Hurricane Season: What We Learned

The 2017 Atlantic hurricane season was among the top ten most active seasons in recorded history. Our experts are exploring what made this year particularly active and the science behind some of the biggest storms to date.

After a period of 12 years without a Category 3 or higher hurricane making landfall in the U.S., Hurricane Harvey made landfall over Texas as a Category 4 hurricane this August.

Harvey was also the biggest rainfall event ever to hit the continental U.S. with estimates more than 49 inches of rain.

Data like this from our Global Precipitation Measurement Mission, which shows the amount of rainfall from the storm and temperatures within the story, are helping scientists better understand how storms develop. 

The unique vantage point of satellites can also help first responders, and this year satellite data helped organizations map out response strategies during hurricanes Harvey, Irma and Maria. 
 

In addition to satellites, we use ground stations and aircraft to track hurricanes.

We also use the capabilities of satellites like Suomi NPP and others that are able to take nighttime views. In this instance, we were able to view the power outages in Puerto Rico. This allowed first responders to see where the location of impacted urban areas.

The combined effort between us, NOAA, FEMA and other federal agencies helps us understand more about how major storms develop, how they gain strength and how they affect us. 

To learn more about how we study storms, go to www.nasa.gov/Hurricanes.

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Moon Mountain Named After Melba Roy Mouton, NASA Mathematician

Award-winning NASA mathematician and computer programmer Melba Mouton is being honored with the naming of a mountain at the Moon’s South Pole. Mouton joined NASA in 1959, just a year after the space agency was established. She was the leader of a team that coded computer programs to calculate spacecraft trajectories and locations. Her contributions were instrumental to landing the first humans on the Moon.

She also led the group of "human computers," who tracked the Echo satellites. Roy and her team's computations helped produce the orbital element timetables by which millions could view the satellite from Earth as it passed overhead.

The towering lunar landmark now known as “Mons Mouton” stands at a height greater than 19,000 feet. The mountain was created over billions of years by lunar impacts. Huge craters lie around its base—some with cliff-like edges that descend into areas of permanent darkness. Mons Mouton is the future landing site of VIPER, our first robotic Moon rover. The rover will explore the Moon’s surface to help gain a better understanding of the origin of lunar water. Here are things to know:

Mons Mouton is a wide, relatively flat-topped mountain that stretches roughly 2,700 square miles

The mountain is the highest spot at the Moon’s South Pole and can be seen from Earth with a telescope

Our VIPER Moon rover will explore Mons Mouton over the course of its 100-day mission

VIPER will map potential resources which will help inform future landing sites under our Artemis program

The VIPER mission is managed by our Ames Research Center in California’s Silicon Valley. The approximately 1,000-pound rover will be delivered to the Moon by a commercial vendor as part of our Commercial Lunar Payload Services initiative, delivering science and technology payloads to and near the Moon.

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Worlds That Will Make You Believe Star Wars is Real

The fantastical planets in Star Wars preceded our discovery of real planets outside our solar system…but fiction isn’t too far from the facts. When we send our spacecraft into the solar system and point our telescopes beyond, we often see things that seem taken right out of the Star Wars universe.

Is there a more perfect time than May the 4th to compare real worlds to the ones depicted in Star Wars? 

Probably not...so here are a few:

Mimas

Saturn’s moon, Mimas, has become known as the "Death Star" moon because of how its 80-mile wide Herschel crater creates a resemblance to the Imperial battle station, especially when seen in this view from our Cassini spacecraft. 

Kepler-452b

The most recently revealed exoplanet dubbed as Earth’s bigger, older cousin, Kepler-452b, might make a good stand-in for Coruscant — the high tech world seen in several Star Wars films whose surface is encased in a single, globe-spanning city. Kepler-452b belongs to a star system 1.5 billion years older than Earth’s! That would give any technologically adept species more than a billion-year jump ahead of us.

CoRoT-7b

At 3,600 degrees Fahrenheit, CoRoT-7B is a HOT planet. Discovered in 2010 with France’s CoRoT satellite, it’s some 480 light-years away, and has a diameter 70% larger than Earth’s, with nearly five times the mass. Possibly the boiled-down remnant of a Saturn-sized planet, its orbit is so tight that its star looms much larger in its sky than our sun appears to us, keeping its sun-facing surface molten!  This scorching planet orbiting close to its star could be a good analog for planet Mustafar from Star Wars. 

Kepler-16b

Luke Skywalker’s home planet, Tatooine, is said to possess a harsh, desert environment, swept by sandstorms as it roasts under the glare of twin suns. Real exoplanets in the thrall of two or more suns are even harsher! Kepler-16b was the Kepler telescope’s first discovery of a planet in a “circumbinary” orbit (a.k.a, circling both stars, as opposed to just one, in a double star system). This planet, however, is likely cold, about the size of Saturn, and gaseous, though partly composed of rock.

OGLE-2005-BLG-390

Fictional Hoth is a frozen tundra that briefly serves as a base for the hidden Rebel Alliance. It’s also the nickname of real exoplanet OGLE-2005-BLG-390, a cold super-Earth whose surface temperature clocks in at minus 364 degrees Fahrenheit.

Kepler-22b

Kepler-22b, analog to the Star Wars planet Kamino…which was the birthplace of the army of clone soldiers, is a super-Earth that could be covered in a super ocean. The jury is still out on Kepler-22b’s true nature; at 2.4 times Earth’s radius, it might even be gaseous. But if the ocean world idea turns out to be right, we can envision a physically plausible Kamino-like planet.

Gas Giants

Gas giants of all stripes populate the real exoplanet universe; in Star Wars, a gas giant called Bespin is home to a “Cloud City” actively involved in atmospheric mining. Mining the atmospheres of giant gas planets is a staple of science fiction. We too have examined the question, and found that gases such as helium-3 and hydrogen could theoretically be extracted from the atmospheres of Uranus and Neptune. 

Exomoons

Endor, the forested realm of the Ewoks, orbits a gas giant. Exomoon detection is still in its infancy for scientists on Earth. However, a possible exomoon (a moon circling a distant planet) was observed in 2014 via microlensing. It will remain unconfirmed, however, since each microlensing event can be seen only once.

May the 4th be with you!

Discover more about exoplanets here: https://exoplanets.jpl.nasa.gov/

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