High Point
It's not much to look at, but Selenean Summit, indicated by the red arrow, is the tallest spot on the…
Hot Spiral
This infrared view, captured by Spitzer Space Telescope, clearly outlines the spiral arms of Messier 31, the Andromeda Galaxy. The…
Pillars of Creation
This Hubble Space Telescope image shows the "Pillars of Creation" — towers of gas and dust that are giving birth…
Buggy Discovery?
This microscopic image of a meteorite from Mars shows tube-like structures. In 1996, NASA scientists announced that these structures could…
A Busy Mission
Three views of Apollo 15, a mission that landed on the Moon 50 years ago. From left: This orbital view…
A Great View
Apollo 15 astronaut Jim Irwin salutes the American flag during one of three moonwalks in July 1971. The lunar module…
The End
The space shuttle program wrapped up 10 years ago with the landing of Atlantis at the end of mission STS-135,…
Building Worlds
Pluto and its largest moon, Charon, are shown to scale in these images from New Horizons, which flew past Pluto…
Galactic Heart
A half-million stars blaze in the center of the Milky Way Galaxy in this view from Hubble Space Telescope. Various…
Big Planet, Little Star
A giant planet orbits a small star, known as a red dwarf, in this artist's concept. Some astronomers have hypothesized…