Over the past decade or so, astronomers have speculated about the characteristics of rogue planets in the Milky Way galaxy.

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

The only planet "out of the loop," so to speak, is Mercury, which is aligned too close to the sun to be seen all month. Related: Night sky, May 2025: What you can see tonight [maps] Read more ...

K2-18b is a bit unusual as a planet in the “habitable zone,” where the temperature is just right for water to exist and support life as we know it. Scientists estimate that its climate ...

These four planets are all expected to be visible high above the eastern horizon in the Southern Hemisphere, the website stated. They should be spotted while it’s still dark, one hour before ...

Beyond our solar system, sub-Neptunes — gassy planets larger than Earth but smaller than Neptune — reign as the most common type of exoplanet observed in our galaxy. Despite their prevalence ...

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