A star’s flyby likely altered the orbits of trans-Neptunian objects beyond Neptune that changes how we view the solar ...

The James Webb Space Telescope and its legacy partner Hubble will hunt for a rocky exoplanet with air around a red dwarf star ...

A passing star may have kicked the weird moons of giant planets like Jupiter and Saturn into place, new research suggests.

PT5 will only be in Earth’s orbit for a few weeks, from Sept. 29 until Nov. 25, but will remain close for a few months ...

Other effects that could tweak planetary orbits would also need to be accounted for, such as the solar wind of charged particles that streams out from the sun, says astrophysicist Andreas Burkert ...

Astronomers have found evidence of a process that supports an alternative, more rapid approach to planetary formation, more ...

See how our seasons come from Earth's tilt and yearly loop around the sun, which changes the ice cover, vegetation, and ...

So far, searches for the hypothetical Planet Nine have yielded no such world. There are many possible reasons for this, one ...

Starting with the innermost planets; Mercury and Venus. Their apparent orbits are closer to the Sun and so it's essential only to be viewed at certain times with due care. At points in the year ...

Astronomers have discovered an enormous exoplanet in the Great Bear constellation. The newly identified planet is referred to ...

It has a mass as much as 11 times that of Jupiter, orbits its star in 14 years and has a temperature of no more than minus ...