A very rare treat is about to grace Earth's night skies.

NASA Hubble Telescope captured this image of the planet Mars in 2018. This high-resolution image was more powerful than the spacecraft that visited the planet.

To put it into perspective, if the age of the Solar System were a year, humans would appear on Earth just before the countdown on New Year’s Eve. This is an illustration of Tythe, a hypothetical ...

Kuiper Belt, well past the orbit of Neptune (artistic illustration). There may be an undiscovered planet in the outer solar system whose presence is revealed by the strange orbit of objects beyond ...