Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system.

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

The rover's 26th sample, known as "Silver Mountain," has textures "unlike anything we've seen before," NASA says.

Does our Solar System have 9 planets or only 8? Astronomers have gone back and forth on that a lot, with Pluto now being classified as a dwarf planet. However, out beyond Neptune there could be ...

New research shows that star activity can distort exoplanet measurements, affecting size, temperature, and atmosphere ...

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

Most of the information we have about planets beyond our solar system (exoplanets) comes from looking at dips in starlight as these planets pass in front of their host star. This technique can ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

The OSIRIS-REx mission returned to the sample to Earth in September of 2023, and these studies show that it contains amino ...

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...