Terrestrial planets include the four closest to our sun, including Mercury, Venus, Earth and Mars. What else makes these celestial bodies terrestrial planets?

Uncertainty about the nature of Starfield's planets has RPS reminiscing about the wonderful weirdness of "outer space" in the Elder Scrolls series.

Planets beyond our solar system, we now know, come in all shapes, sizes and consistencies.  There are rocky planets, water worlds, gaseous planets, super-Earths, hot Jupiters, tidally locked planets, planets in orbital resonance with each other,  and so much more. A group of exoplanet researchers at the University of Cambridge have recently proposed a new […]

Behold the giant planets in infrared [via James O'Donahue]! Specifically, the infrared wavelength of light is represented as white so that you can see it, among other false-color features of …

The rare alignment of five naked-eye planets is expected to peak on Friday morning, with the crescent moon joining the procession. But, there is more to see.

Five naked-eye planets are visible in the sky before sunrise during the month of June. NASA reported that the moon will join the planetary procession on the 23rd.

A new study examines whether binary-star planets - planets orbiting 2 suns - can harbor life. The post Can binary-star planets support life? first appeared on EarthSky.

Wondering what planets are retrograde right now? Here are the dates each planet is retrograde in 2024, including the current retrogrades affecting you now.

The solar system's eight planets will never truly be in a straight line, but they can get close to it.

Ready to tour the Universe? Find the perfect companion with our guide to the best telescopes for planets.

Some planets, such as Saturn, have more than a hundred moons, while others, such as Venus, have none.

Precipitation does fall from the clouds of other planets, but it's a little more exotic than the rainwater we get here on Earth. Imagine sheets of methane, sulfuric acid and, yes, diamonds falling from the sky.

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy

Beyond our solar system, countless alien worlds of lava, ice, water and noxious gas swirl through the cosmos. Here are some of the strangest exoplanets that scientists have discovered so far.

With the help of the CHEOPS space telescope an international team of European astronomers managed to clearly identify the existence of four new exoplanets. The four mini-Neptunes are smaller and cooler, and more difficult to find than the so-called Hot Jupiter exoplanets which have been found in abundance. Two of the four resulting papers are led by researchers from the University of Bern and the University of…

You may know how other planets look, like the rust orange, dusty surface of Mars or the vibrant teal of Uranus. But what do those planets sound like?

An international team of researchers has released a new study of "polluted" white dwarf stars showing that stars and planets likely form simultaneously. The post Stars and planets grow rapidly together first appeared on EarthSky.

In a new paper in the International Journal of Astrobiology, researchers broaden the idea of intelligence as a collective property and extend it to the planetary scale.

With every big exoplanet discovery comes a stunning artist's rendition of a new world. Are these images realistic?

More than 5,000 exoplanets have been discovered and 8,709 candidates are still being studied.