The Arrangement Of The Spiral Arms In The Galaxy Messier 63, Seen Here In An Image From The NASA/ESA

The Arrangement Of The Spiral Arms In The Galaxy Messier 63, Seen Here In An Image From The NASA/ESA

The arrangement of the spiral arms in the galaxy Messier 63, seen here in an image from the NASA/ESA Hubble Space Telescope, recall the pattern at the center of a sunflower. So the nickname for this cosmic object -- the Sunflower Galaxy -- is no coincidence. Discovered by Pierre Mechain in 1779, the galaxy later made it as the 63rd entry into fellow French astronomer Charles Messier's famous catalogue, published in 1781. The two astronomers spotted the Sunflower Galaxy's glow in the small, northern constellation Canes Venatici (the Hunting Dogs). We now know this galaxy is about 27 million light-years away and belongs to the M51 Group -- a group of galaxies, named after its brightest member, Messier 51, another spiral-shaped galaxy dubbed the Whirlpool Galaxy. Galactic arms, sunflowers and whirlpools are only a few examples of nature's apparent preference for spirals. For galaxies like Messier 63 the winding arms shine bright because of the presence of recently formed, blue-white giant stars and clusters, readily seen in this Hubble image.  Image credit: ESA/Hubble & NASA Text credit: European Space Agency Hubble Space Telescope

More Posts from Samstein1012 and Others

8 years ago

Vote for Space at SXSW 2017

We need your help! There are a number of exciting space-related panels proposed for next year’s South by Southwest Interactive Festival in Austin, Texas. SXSW is a community-driven event and voting accounts for 30% of the decision-making process for any given programming slot. The selection process is extremely competitive and the more votes we submit for the space panels, the more likely a panel related to space exploration will be included in the final SXSW program. 

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To help you out as you consider what to vote for, we’ve put together a list of all the NASA-related panel proposals. 

These proposals look at ways we explore the solar system and beyond:

New Eyes on our Home System: NASA’s Next Telescope

Dark Energy and Exoplanets: NASA’s WFIRST Mission

Capturing NASA’s James Webb Space Telescope

Lessons from the Fringes of the Solar System

Into the Unknown: The People Behind Webb Telescope

These proposals looks at how we’re using out-of-this-world tech and data to create incredible experiences here on Earth and helping solve challenges through your participation:

Space 360: Experience NASA Missions in VR/AR/video

The Power of Many: Wisdom from the Crowd 

It’s Time to Ask More of Open Data

A little closer to home, this proposal explores our work to study and observe our dynamic home world, Earth:

NASA - Doing Work to Keep it Cool 

We want to send humans on a journey to Mars. How? These proposals would dive into this question and more: 

So you want to go to Mars?

Humans, Robots + Microbes: The Challenge of Mars

“Because They Are Hard”: NASA & Mars

Lastly, we’re proposing a meetup for NASA and the entire space community at SXSW 2017:

Space Meetup

Community voting and commenting for SXSW 2017 is open through September 2, 2016.

We look forward to seeing you in Austin in March at the SXSW Interactive Festival. Thanks!

8 years ago
Eta Carinae And Keyhole Nebula (NGC 3324), Inside The Carina Nebula (NGC 3372)

Eta Carinae and Keyhole Nebula (NGC 3324), inside the Carina Nebula (NGC 3372)


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8 years ago

We have been expecting you Mr Handle......

8 years ago
ABRACADABRA (A Broadband/Resonant Approach To Cosmic Axion Detection With An Amplifying B-field Ring

ABRACADABRA (A Broadband/Resonant Approach to Cosmic Axion Detection with an Amplifying B-field Ring Apparatus), consists of a series of magnetic coils, wound in the shape of a toroid, or donut, which is then encased in a layer of superconducting metal and kept at temperatures just above absolute zero. The scientists plan to use a highly sensitive magnetometer, placed inside the donut hole, to detect any signs of axions’ influence. MIT physicists are proposing a new experiment to detect a dark matter particle called the axion. If successful, the effort could crack one of the most perplexing unsolved mysteries in particle physics, as well as finally yield a glimpse of dark matter. Axions are hypothetical elementary particles that are thought to be among the lightest particles in the universe — about one-quintillionth the size of a proton. These ultralight particles are virtually invisible, yet if they exist, axions and other yet-unobserved particles may make up 80 percent of the material in the universe, in the form of dark matter. In a paper published online in Physical Review Letters, the MIT team proposes an experiment to detect axions by simulating an extreme astrophysical phenomenon known as a magnetar — a type of neutron star that generates an immensely powerful magnetic field. The physicists reasoned that in the presence of an axion such a huge magnetic field should waver ever so slightly, producing a second, vastly smaller magnetic field as a signature of the axion itself. The team consists of MIT associate professor of physics Jesse Thaler, MIT Pappalardo Fellow Benjamin Safdi, and Yonatan Kahn PhD ’15, now a postdoc at Princeton University. Together, they designed an experiment to recreate the physics of a magnetar in a controlled laboratory environment, using technology borrowed from magnetic resonance imaging (MRI). The core of the experiment, which they’ve named ABRACADABRA (A Broadband/Resonant Approach to Cosmic Axion Detection with an Amplifying B-field Ring Apparatus), consists of a series of magnetic coils, wound in the shape of a toroid, or donut, which is then encased in a layer of superconducting metal and kept in a refrigerator at temperatures just above absolute zero, to minimize external noise. The scientists plan to use a highly sensitive magnetometer, placed inside the donut hole, to detect any signs of axions’ influence. “Axions are very strange, counterintuitive particles,” Thaler says. “They’re extremely light, with feeble interactions, and yet this particle may dominate the matter budget of the universe and be five times more abundant by mass than ordinary matter. So we really had to think hard on whether these particles are in principle detectable using current technology. It’s extremely daunting.” A “tantalizing” particle If they are detected, axions may also explain an outstanding dilemma in particle physics, known as the Strong CP (charge parity) problem: Since the 1970s, scientists have grown increasingly puzzled over what Safdi describes as “the indifference of neutrons to electric fields.” Neutrons are elementary particles that are found in the nucleus of almost every atom in matter, and they do not carry a net charge. “We don’t expect neutrons to accelerate in the presence of an electric field because they don’t carry electric charge, but you might expect them to rotate,” Safdi says. “That’s because we expect them to have an electric dipole moment, where you can think of a neutron having a plus charge on one side and a minus charge on the other. But from our current understanding, this rotation effect does not exist, whereas theory says it should.” Scientists have hypothesized that this bizarre effect may be explained by the axion, which would somehow remove a neutron’s electric dipole moment. If so, the axion would modify electric and magnetic phenomena in a way that could be detectable experimentally. “It’s very tantalizing to say there might be a particle that serves this deep purpose, and even more so if we were to detect the presence of these particles in the form of dark matter,” Thaler says. The hunt is on Currently, Thaler says most axion hunting has been carried out by researchers at the University of Washington who are running the Axion Dark Matter Experiment, or ADMX. The experiment uses a resonant microwave cavity, set within a large superconducting magnet, to detect very weak conversions of axions to microwave photons. The experiment is tuned to look for axions within a specific range of around one quadrillionth the mass of a proton. Thaler and his team realized that they could extend this range, and look for much smaller, lighter particles, on the order of one quintillionth the mass of a proton, by recreating the physics of magnetars, in the lab. “The Strong CP problem is associated with whether a neutron’s spin responds to electric effects, and you can kind of think of a magnetar as one gigantic spin with big magnetic fields,” Thaler explains. “If axions are coming in and changing the properties of nuclear matter to resolve the Strong CP problem, maybe axions can interact with this magnetar and allow you to see it in a new way. So the subtle effects of axions should be amplified.” The team’s prototype design is surprisingly small — “about the palm of your hand,” Safdi says. The researchers, who are theoretical physicists by training, are now working with experimentalists at MIT to build the prototype, which is designed to generate a baseline magnetic field of about 1 tesla, comparable to current MRI machines. If axions are present, that field should waver slightly, producing a very tiny oscillation at a frequency that is directly related to the axion’s mass. Using a high-precision magnetometer, Thaler hopes to pick up that frequency and ultimately use it to identify the axion’s size. “Only recently have there been many good ideas to search for [low-frequency axions],” says Gray Rybka, an assistant professor of physics at the University of Washington and an ADMX researcher, who was not involved in the research. “The experiment proposed here builds on previous ideas and, if the authors are correct, may be the most practical experimental configuration that can explore some of the plausible lower-frequency axion regimes.” “We have an instrument that’s sensitive to many wavelengths, and we can tickle it with an axion of one particular wavelength, and ABRACADABRA will resonate,” Thaler says. “And we will be going into uncharted territory, where we could possibly see dark matter from this prototype. That would be amazing.” This research was supported, in part, by the U.S. Department of Energy and the Alfred P. Sloan Foundation. 


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8 years ago
For More On The Fermi Paradox And Why Alien Life Hasn’t Found Us Yet. (Infographic Via Futurism)
For More On The Fermi Paradox And Why Alien Life Hasn’t Found Us Yet. (Infographic Via Futurism)
For More On The Fermi Paradox And Why Alien Life Hasn’t Found Us Yet. (Infographic Via Futurism)
For More On The Fermi Paradox And Why Alien Life Hasn’t Found Us Yet. (Infographic Via Futurism)
For More On The Fermi Paradox And Why Alien Life Hasn’t Found Us Yet. (Infographic Via Futurism)

For more on the Fermi Paradox and why alien life hasn’t found us yet. (Infographic via futurism)

9 years ago
What Strange World Is This? Earth. In The Foreground Of The Featured Image Are ThePinnacles, Unusual

What strange world is this? Earth. In the foreground of the featured image are thePinnacles, unusual rock spires in Nambung National Park in Western Australia. Made of ancient sea shells (limestone), how these human-sizedpicturesque spires formed remains unknown. In the background, just past the end of the central Pinnacle, is a bright crescent Moon. The eerie glow around the Moon is mostly zodiacal light, sunlight reflected by dust grains orbiting between the planets in the Solar System. Arching across the top is the central band of our Milky Way Galaxy. Many famous stars and nebula are also visible in the background night sky. The featured 29-panel panorama was taken and composed last September after detailed planning that involved the Moon, the rock spires, and their corresponding shadows. Even so, the strong zodiacal light was a pleasant surprise. Image Credit: Michael Goh


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8 years ago

6 Ways Earth Observations Tackle Real-World Problems

This summer, 30 research projects were launched by recent college graduates and early career professionals as part of our DEVELOP program. The aim is to use our satellite observations of Earth to address an environmental or public policy issue. And they have just 10 weeks to do it! On Aug. 10, 2016, the “DEVELOPers” gathered at our Headquarters in Washington, DC to showcase their results. So, how can Earth observations solve real-world problems? Let’s take a look:

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1. They help land managers identify the locations of invasive species.

Austin Haney, DEVELOP project co-lead at University of Georgia, has seen first-hand how an invasive species can affect the ecosystem of Lake Thurmond, a large reservoir that straddles the border between Georgia and South Carolina. Birds in the area “behave visibly different,” he said, after they consume a toxic cyanobacteria that lives on Hydrilla verticillata, an invasive aquatic plant. Ingesting the toxin causes a neurodegenerative disease and ultimately death. Scores of birds have been found dead near lake areas where large amounts of the toxin-supporting Hydrilla grow. To help lake managers better address the situation, Haney and project members developed a tool that uses data from the Landsat 8 satellite to map the distribution of Hydrilla across the lake. 

Image Credit: NASA/Bill Ingalls

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2. They help identify wildlife habitat threatened by wildfires.

Maps that depict habitat and fire risk in eastern Idaho previously stopped short of Craters of the Moon National Monument and Preserve, where shrubs and grasses transition to a sea of ankle-twisting basalt. But the environment is not as inhospitable as it first appears. Throughout the monument there are more than 500 kipukas —pockets of older lava capable of supporting some vegetation. That means it is also prone to burning. Project lead Courtney Ohr explained how her team used data from the Landsat 8 and Sentinel-2 satellites to develop a model that can simulate the area’s susceptibility to wildfires. Decision makers can use this model to monitor the remote wildlife habitat from afar.

Image Credit: NASA/Bill Ingalls

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3. In conjunction with Instagram, they help find seaweed blooms

Who knew that Instagram could be a tool for science? One DEVELOP team searched for photographs of massive seaweed (sargassum) blooms in the Caribbean, mapped the locations, and then checked what satellites could see. In the process, they tested two techniques for finding algae and floating vegetation in the ocean.

Image Credit: Caribbean Oceans Team

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4. They help conserve water by reducing urban stormwater runoff.

Atlanta’s sewer system is among the nation’s most expensive. Yet, the city still struggles with stormwater. It’s an uphill climb as new construction paves over more of the city, hindering its ability to absorb rain. The University of Georgia DEVELOP team partnered with The Nature Conservancy to address the problem.

Using satellite imagery, the team was able to pinpoint areas well-poised to capture more of the city’s runoff. They identified 17 communities ripe for expanding green infrastructure and reforestation. The team used the Land-Use Conflict Identification Strategy and Soil and Water Assessment Tool models and Landsat and Terra satellite data. Their analysis provides local groups with a working picture of the city’s water resources.

Image Credit: NASA/Bill Ingalls

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5. They show the spread of the mite eating away Puerto Rico’s palm trees.

The red palm mite has devastated Puerto Rico’s trees in recent years. The insect chewed its way through coconut palms, bananas, and plantains on the island in the recent decade. Its spread has hurt crops across the Caribbean.

A DEVELOP team led by Sara Lubkin analyzed satellite imagery to track the mites’ rapid spread from 2002. The team mapped changes to vegetation, such as yellowing, and differences in canopy structure. They made use of imagery from Landsat, Hyperion, IKONOS, and aerial views. Their work can be used to mitigate current mite infestations and monitor and prevent future ones.

Image Credit: NASA/Bill Ingalls

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6. They evaluate landslide-prone areas in the developing world

One team of DEVELOPers took on several projects to aid people in developing nations. This team from Alabama examined satellite imagery to find past landslides in the African nation of Malawi. Factors such as flooding after long periods of drought have made the country increasingly prone to landslides. Blending maps of the landscape, rainfall data, and population centers, the young researchers assessed the areas most at risk—and most in need of education and support—from landslides.

Image Credit: East Africa Disasters II Team

Want to read more about DEVELOP projects, or get involved? Summaries, images, and maps of current and past projects can be viewed HERE. You can also learn how to apply for the DEVELOP program HERE.  

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com

8 years ago

Space Station Science: Biological Research

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Each month, we highlight a different research topic on the International Space Station. In August, our focus is biological research. Learning how spaceflight affects living organisms will help us understand potential health risks related to humans on long duration missions, including our journey to Mars.

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Cells, microbes, animals and plants are affected by microgravity, and studying the processes involved in adaptation to spaceflight increases our fundamental understanding of biological processes on Earth. Results on Earth from biological research in space include the development of new medications, improved agriculture, advancements in tissue engineering and regeneration, and more. 

Take a look at a few of the biological research experiments performed on space station:

Biomolecule Sequencer

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Living organisms contain DNA, and sequencing DNA is a powerful way to understand how they respond to changing environments. The Biomolecule Sequencer experiment hopes to demonstrate (for the first time) that DNA sequencing is feasible in an orbiting spacecraft. Why? A space-based DNA sequencer could identify microbes, diagnose diseases and understand crew member health, and potentially help detect DNA- based life elsewhere in the solar system.

Ant-stronauts

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Yes, ant-stronauts…as in ants in space. These types of studies provide insights into how ants answer collective search problems. Watching how the colony adapts as a unit in the quest for resources in extreme environments, like space, provides data that can be used to build algorithms with varied applications. Understanding how ants search in different conditions could have applications for robotics.

TAGES

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The TAGES experiment (Transgenic Arabidopsis Gene Expression System) looks to see how microgravity impacts the growth of plant roots. Fluorescent markers placed on the plant’s genes allow scientists to study root development of Arabidopsis (a cress plant) grown on the space station. Evidence shows that directional light in microgravity skews root growth to the right, rather than straight down from the light source. Root growth patters on station mimic that of plants grown at at 45% degree angle on Earth. Space flight appears to slow the rate of the plant’s early growth as well.

Heart Cells

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Spaceflight can cause a suite of negative health effects, which become more problematic as crew members stay in orbit for long periods of time. Effects of Microgravity on Stem Cell-Derived Cardiomycytes (Heart Cells) studies the human heart, specifically how heart muscle tissue contracts, grows and changes in microgravity. Understanding how heart muscle cells change in space improves efforts for studying disease, screening drugs and conducting cell replacement therapy for future space missions.

Medaka Fish

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Chew on these results…Jaw bones of Japanese Medaka fish in microgravity show decreased mineral density and increased volume of osteoclasts, cells that break down bone tissue. Results from this study improve our understanding of the mechanisms behind bone density and organ tissue changes in space.

These experiments, and many others, emphasize the importance of biological research on the space station. Understanding the potential health effects for crew members in microgravity will help us develop preventatives and countermeasures.

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com

9 years ago

'NASA's Hubble Telescope Detects ‘Sunscreen' Layer on Distant Planet': via #NASA_APP


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  • samstein1012
    samstein1012 reblogged this · 9 years ago
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