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

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

A large asteroid could be heading toward Earth within the next decade, and there's a small chance it could strike the planet, according to NASA.

The wannabe asteroid, announced on Jan. 2 as 2018 CN41, is actually a Tesla Roadster launched into space years ago by SpaceX ...

The car, launched in 2018 on a SpaceX rocket’s upper stage, is one of many human-made objects in deep space that could ...

However, hours later the MPC announced it was removing the object from its records because it wasn't an asteroid at all. It ...

How on Earth was a Tesla Roadster electric sports car confused with an asteroid and what was it doing orbiting the sun in the ...

Catch Tallahassee Astronomical Society’s free planetarium show “February Skies over Tallahassee,” at the Fogg Planetarium on Feb. 1.

That puts it only slightly farther than Mars' current orbit of 1.5 AU from the sun. The simulations show that just one substellar object flyby was sufficient to alter the giant planets' trajectories.

The Minor Planet Center seemingly mistook Elon Musk's Tesla Roadster for a small body in space earlier this month, much to ...

However, since planets orbit the Sun in different orbits in three-dimensional ... of substellar flybys on the dynamical excitation of minor planets in the asteroid belt and the trans-Neptunian ...

The Red Planet will be at its closest point to Earth, also known as perigee, on Jan. 12 and will be exactly opposite the sun ...