THE James Webb Space Telescope has discovered its first-ever exoplanet – a distant world hidden by the glare of its nearest ...

Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts ...

How long does it take Pluto to orbit the sun? Learn more about how this planet makes one lap around our Solar System.

Astronomers using the European Space Agency's Cheops mission have caught an exoplanet that seems to be triggering flares of ...

A stronomers have discovered over 100 new alien worlds so far this year — some many light-years away from Earth — that ...

Stars often whip their planets with solar winds and radiation, pull them ever closer with gravity and sear them with heat.

Because Earth moves in an elliptical orbit around the sun, being further away means it travels slower along its orbit. This ...

Long theorized but never observed, the first known “planet with a death wish” is described by Ilin and her colleagues in a ...

On July 3, 2025, at 3:54 pm ET, the Earth will officially reach its furthest point from the Sun for this year. This is called aphelion. Our planet’s orbit is very close to a circle, but it is not a ...

Our planet whirls around the sun in an ellipse, rather than a circle. ... Mars, with an eccentricity of 0.094, ranges from 129 to 155 million miles away from the sun.