The Giant Planet resembles a majestic golden star, and stands high in the southwest at nightfall during April; it sets around ...

We often focus on space observatories that peer beyond Earth. But the vast majority of satellites stare right back at us.

Ganymede, Jupiter's largest moon and the solar system's largest, is bigger than Mercury and the dwarf planet Pluto, with a diameter of 5,268 kilometers.

NASA’s Mariner 10 space probe was the first spacecraft to complete a flyby of Mercury. The first of its three encounters with the planet took place on this day in ...

By Dean Murray Scientists say they have made a "shocking" discovery on Mars. NASA's Perseverance Science Team was "astonished ...

The ice giant officially joins the lineup of planets with auroras, completing the set of all eight planets in the Solar ...

A striking new image from the James Webb Space Telescope shows a rare object called an Einstein ring. This shows what appears to be a ring-shaped object in the sky, but is actually created by two ...

Plus: A solar eclipse and an occultation of the Pleiades as our satellite skims through several constellations in the sky ...

The two exoplanets, or planets outside of our solar system, orbit a star called TOI-1453, which is slightly cooler and ...

The most elusive planetary aurora in the Solar System has finally been revealed in all its gently glowing glory.

Despite a disastrous test launch that stranded two astronauts on board the International Space Station, Boeing hasn't given ...

Scientists estimate there are ~1 septillion (1 followed by 24 zeros) planets in the observable universe. This figure is based ...