A planet roughly the size of Neptune has stunned astronomers by orbiting its star in the opposite direction of the star’s ...

At the right point of the orbit and stellar cycle, the star’s chromosphere brightens.

A network of powerful ground-based telescopes captured rare starspot-crossing events on TOI-3884b, revealing cooler patches on the star’s surface and rapid changes tied to its rotation. By combining ...

Dead satellites and drift-prone GPS coordinates aren’t your phone’s fault — they’re side effects of something unprecedented happening to our planet. Climate change is slowing Earth’s rotation at the ...

In space, planets are supposed to orbit their stars in roughly the same direction that the star itself spins. It is a rule ...

Venus' bizarre and extraordinarily slow retrograde rotation on its axis has long puzzled planetary scientists. But in a new paper presented at the recent European Geosciences Union General Assembly in ...

Scientists announced Monday that Earth is rotating slightly faster than normal, resulting in what is expected to become the second-shortest day ever recorded since precise atomic timekeeping began.

Using the Keck Observatory, astronomers measured the spins of dozens of giant planets and brown dwarfs orbiting distant stars. They found that giant planets can spin faster than much more massive ...

The same happens when they're annihilated. The temperature increase is due to how much dark matter enters the planet, and the energy that's input can also accelerate the planet's rotation period.

The classical picture of star and planet formation suggests that a star’s rotational axis and the orbital planes of its planets should be aligned. However, exoplanetary systems have considerable ...

Have you ever wondered how long it takes for each planet to orbit the Sun? From Mercury’s blazing 88-day year to Neptune’s astonishing 165-year journey, every planet moves at a completely different ...