Liquid water once shaped the rock inside a meteorite from Mars, but likely did not support any microbial life, a new study finds.
New meteorite research suggests that cosmic impacts might have helped deliver vital ingredients of life to ancient Earth.
Reference Learn how stars form, how stars and constellations are named, what happens when stars like our sun evolve, and ultimately, die.
Reference Planet Mercury is the sun's nearest planetary neighbor. It has short years, long days, huge surface temperature fluctuations and really weird sunsets.
Reference Venus is the second planet from the sun and the hottest and brightest planet in the solar system. Explore the hostile volcanic planet here in our guide.
The most distant single star seen yet dates back to less than 1 billion years after the universe's birth in the Big Bang, and may shed light on the earliest stars in the cosmos, a new study finds.
Two giant bubbles of gamma rays and X-rays that erupted from the center of the Milky Way may stem from a supermassive black hole's feeding frenzy at the heart of the galaxy, a new study finds.
Miniature spaceships the size of cellphones could fly across the solar system using sails propelled by lasers, reaching distant destinations on very reasonable timescales.
Two dozen so-called superhabitable alien worlds may be as good as or better than Earth for life as we know it.
Neptune is the farthest planet from the sun and was the first to be predicted before it was discovered.
The water that Earth has may have been here since the planet formed, and not delivered later by collisions with icy comets, a new study finds.
Distant X-rays may be the most direct evidence yet of the remains of a disintegrated planet colliding with the corpse of a star, a new study finds.
Astronomers may have for the first time detected and measured the mass of an isolated stellar-mass black hole, a new study finds.
A detailed new telescope image of the heart of our galaxy is now giving researchers their best view yet of hundreds of strange magnetic filaments seen nowhere else.
Reference Learn about the physical characteristics of Saturn and its famous rings, what we know about Saturn’s moons and Saturn’s roots in Greek mythology.
Black holes can not only rip stars apart, but they can also trigger star formation, as scientists have now seen in a nearby dwarf galaxy.
Reference The universe was born with the Big Bang as an unimaginably hot, dense point. SPACE.com offers an overview of the universe and its history, age and structure.
Earth is surrounded by a vast bubble about 1,000 light-years wide whose borders drive the formation of all nearby young stars, a new study finds.
Earth and Mars must have formed from collisions between giant moon-sized rocks rather than from clumping together of a huge amount of tiny pebbles, a new study found.
Learn how Earth’s moon formed, how its orbit affects Earth’s tides, why solar and lunar eclipses happen and the history of lunar exploration.