"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today ...

Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

Ammonite was discovered using the Subaru Telescope in Hawaii, with follow-up confirmation from the Canada-France-Hawaii ...

Astronomers first identified these minerals using the now-three-year-old James Webb Space Telescope. To see where exactly the ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

CAPE CANAVERAL, Fla. (AP) — Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a precious peek into the dawn of our own solar ...

The great alignment, including Mercury, will only happen for a few evenings around 28 February, depending on your location. All seven planets will be visible briefly right after sunset, stretching ...

Six-planet solar system in perfect synchrony has been found in the Milky Way. ... But it’s estimated that only 1 in 100 systems have retained that synchrony, and ours isn’t one of them.

Mercury, the smallest planet in the solar system, will be difficult to see with the eye, but it's possible if dark sky conditions are right. An illustration of the night sky on Dec. 28 showing the ...

In fact, it wouldn't take very long to die on other planets in our solar system. On most worlds, you could only survive for seconds . Want to know exactly why these planets are so very deadly?