The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

KQ14, nicknamed "Ammonite", was discovered using the Subaru Telescope and is a highly elliptical object with a perihelion and ...

The solar system's journey through the galaxy is more complex than most imagine. While we often picture planets orbiting the ...

In this activity, you’ll learn how to make scale drawings of solar system orbits, learn about a team of women engineers who launched a satellite mission to orbit Mars, and then plot your own path to ...

The planets of our solar system move in ellipses. We've known this, so we are told, ever since Johannes Kepler devised his laws of planetary motion in the early 1600s. While it's true that orbits ...

That's the shortest orbital period of any known solar system object except the planet Mercury. Skip ... Such effects manifest as a slight wobble in 2021 PH27's elliptical orbit around the sun ...

NASA telescopes in Chile have discovered a comet from interstellar space, making its closest approach in October.

A perfectly circular orbit would have an eccentricity of 0, and the more elliptical or squashed it is ... after a short visit ...

Sedna will reach its closest approach to the Sun in 2076, providing a remarkable space-faring opportunity that won’t come ...

Discover 3I/ATLAS, an interstellar comet with a reddish hue, rich in water ice, and possibly predating the solar system.

This is how long a year is on other planets in our solar system, beginning with Mercury at about 176 Earth days to complete its orbit. Skip to content Introducing the all-new Astronomy.com Forum!

Meet the surprising, oddball worlds moving around our solar system. From meteorites that impact Earth, to a moon that orbits backwards, to an imposter lurking in the asteroid belt, a variety of ...