Innermost Planet News Today : Breaking News, Live Updates & Top Stories | Vimarsana

They are the most common type of planet observed in our Milky Way galaxy - two to three times the diameter of Earth but smaller than Neptune, and orbiting closer to their stars than our solar system's innermost planet Mercury does to the sun. Called "sub-Neptunes," they are absent from our solar system and their fundamental nature has remained a puzzle.

2023 is almost here, and astronomically a lot will be happening. The coming year features a “ring-of-fire” eclipse, meteor showers under dark skies, high solar activity, auroras, eye-catching planetary conjunctions, a possibly bright comet, and important milestones in space science.