Space Shuttle Endeavour Mounted Atop One Of NASA’s Modified Boeing 747 Shuttle Carrier Aircraft.

The Last Shuttle, Dan Winters

lackyblue:

(by Thomas Shahan)

NASA concept art from the Apollo era.

The last shuttle

Photos of our own planet Earth taken by the Cassini spacecraft while it was orbiting Saturn, on 19 July 2013 and 12 April 2017, respectively.

Mountains on the Moon (actually Pluto)

Visualization of How Fast a Ball Drops on Various Solar System Bodies

This is an animation of how quickly an object falls 1 km to the surfaces of solar system objects like the Earth, Sun, Ceres, Jupiter, the Moon, and Pluto. For instance, it takes 14.3 seconds to cover that distance on Earth and 13.8 seconds on Saturn.

It might be surprising to see large planets have a pull comparable to smaller ones at the surface, for example Uranus pulls the ball down slower than at Earth! Why? Because the low average density of Uranus puts the surface far away from the majority of the mass. Similarly, Mars is nearly twice the mass of Mercury, but you can see the surface gravity is actually the same… this indicates that Mercury is much denser than Mars.

(via @thekidshouldsee)

2,000 light years from hone, Ceres

The Sun rises over Earth in a postcard illustrated by Soviet cosmonaut Alexei Leonov, recalling the 1965 mission when he became the first human to walk in space.