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NASA studies the universe from the smallest particles of matter and energy to the biggest questions of the evolution and structure of the cosmos.

The discovery of planets continues to expand beyond the domain of professional astronomers.

An enormous binary star pair some 4,700 light-years away pounds its surroundings with intense outflows called stellar winds.

Planetary nebulae — the expanding, glowing shells of gas coming from sun-like stars at the end of their lives — are some of the most fascinating ...

Swift Discovers a New Black Hole in our Galaxy

10.05.12 - Swift recently detected the presence of a previously unknown stellar-mass black hole.
Hubble Sees Cosmic Riches

10.04.12 - This dazzling image shows the globular cluster Messier 69, or M 69 for short, as viewed through the NASA/ESA Hubble Space Telescope.
NASA Observatory Measures Expansion of Universe

10.03.12 - Astronomers using NASA's Spitzer Space Telescope have announced the most precise measurement yet of the Hubble constant, or the rate at which our universe is stretching apart.
The Helix Nebula - Bigger in Death than Life

10.03.12 - What was once a fairly average star, not much different than our sun, can be seen unraveling at the seams in this new image from the Spitzer and GALEX space telescopes.
Hubble Portrays a Dusty Spiral Galaxy

09.28.12 - This week, we highlight the galaxy NGC 4183, seen here with a beautiful backdrop of distant galaxies and nearby stars.

Mars Rock Touched By NASA Curiosity Rover Offers Surprises

10.11.12 - The first Martian rock NASA's Curiosity rover has reached out to touch presents a more varied composition than expected from previous missions.
NASA's Swift Satellite Discovers A New Black Hole In Our Galaxy

10.05.12 - NASA's Swift satellite recently detected a rising tide of high-energy X-rays from a source toward the center of our Milky Way galaxy. The outburst, produced by a rare X-ray nova, announced the presence of a previously unknown stellar-mass black hole.

NASACast: Universe

Audio and video podcasts on NASA missions looking for answers deep into the cosmos.