Numbers 

Actors & Sunglasses

The Ottoman siege of Constantinople in 1453 as portrayed in a French painting around the same time. The city of Constantinople, which had been impregnable to sieges for centuries due to its position on a peninsula and massive walls, fell after 53 days. The fall of the city marked a change in military tactics, as Ottoman cannons proved able to bring down even the famed walls of Constantinople.

{WHF} {HTE}

Over with 2019

Welcome 2020

@irvnstark on twitter created a collaborative deancas playlist where tons of fans added their favorite songs, breaking the World Record for Longest Spotify Playlist with “The Mixtape A” running at 732hrs 19mins with 10,964 songs. “The Mixtape B” was the second playlist, created by Nico, and currently runs at 674hrs 40mins with 10,364 songs

Curious about how NASA will land the next mission to the Red Planet – the Perseverance Mars rover? Here’s your chance to ask our expert! 

After nearly 300 million miles, our Perseverance rover completes its journey to Mars on Feb. 18. To reach the surface of the Red Planet, it has to survive the harrowing final phase known as Entry, Descent, and Landing. Mission engineer Chloe Sackier will be taking your questions in an Answer Time session on Thursday, Feb. 4 from noon to 1pm ET here on our Tumblr! Make sure to ask your question now by visiting http://nasa.tumblr.com/ask. 

Chloe Sackier is a systems engineer at NASA’s Jet Propulsion Laboratory (JPL) in Southern California. She works on the Mars 2020 Entry, Descent and Landing team, tasked with safely delivering the Perseverance rover to the surface of Mars.

Landing Perseverance on Mars – fun facts: 

The landing system on the mission includes a parachute, descent vehicle, and an approach called a “skycrane maneuver” for lowering the rover on a tether to the surface during the final seconds before landing.

Perseverance will use new technologies for landing, including Terrain-Relative Navigation. This sophisticated navigation system allows the rover to detect and avoid hazardous terrain by diverting around it during its descent through the Martian atmosphere. 

A microphone allows engineers to analyze entry, descent, and landing. It might also capture sounds of the rover at work, which would provide engineers with clues about the rover’s health and operations.

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

Just goblin things

(insta: pinegreentea)