The beautiful Heart Nebula, also known as IC 1805, is a bright, red emission nebula with a shape that resembles a human heart.
Stars are giant, luminous spheres of plasma. Galaxies consist of stars, stellar remnants, dust, gas, and dark matter, bound together by gravity. Learn more about stars and galaxies.
A distant sun-like star may have devoured a dozen or more of its own Earth-size planets, new research shows.
A new image from the Hubble Space Telescope reveals the Cocoon Galaxy, which was once entangled with a neighboring galaxy.
In this edition of Mobile Astronomy, we'll dive into deep-sky objects, the most beautiful and interesting sights in the night sky.
While it's true that we're made of star stuff, it would perhaps be more accurate to say that the universe is composed of numbers.
Skywatchers may wonder how nebulas get their marvelous colors and shapes, and a team of astronomers used the Very Large Telescope to find out.
New computer simulations reveal how supersonic gas streams left over from the Big Bang could fuel some of the largest and oldest black holes in the universe.
A supermassive black hole lies at the heart of most galaxies, and a new study suggests how these ravenous cosmic structures may ultimately define their hosts.
The mysterious, powerful flashes of light known as fast radio bursts (FRBs) may occur once every second somewhere in the universe, a new study suggests.
Not one but two gigantic black holes lurk at the heart of the distant spiral galaxy NGC 7674, a new study suggests.
Learn about the size, shape and composition of asteroids as well as their history, naming conventions, and plans to mine asteroids in the future.
Gorgeous new imagery shows the enormous, glowing bubble that a strange, dying red star has blown around itself.
ESA's new time-lapse video shows that close-by stars have the potential to cause disturbances to the solar system as they travel through our galaxy in the next hundreds of thousands of years.
By studying the emissions from the centers of certain galaxies, scientists can achieve a more precise understanding of how fast the universe is expanding.
Astronomers have set a new distance record, detecting the magnetic field of a galaxy located 5 billion light-years from Earth.
A new photo of the red "supergiant" Antares is the best ever captured of a star other than the sun, researchers said.
Learn all about pulsars — neutron stars that seem to blink on and off superfast — in the 16th episode of the astrophysics-explainer video series "We Don't Planet."