Mercury's surface can reach a blistering 800 degrees Fahrenheit (430 degrees Celsius) during the day, according to NASA. But the planet lacks an atmosphere to hold that heat in — so, on Mercury ...

Its atmosphere is mainly composed of hydrogen ... It is about a third closer to its star than our solar system's innermost planet Mercury is to the sun - so close that it completes an orbit ...

How hot is Mercury? Mercury's sun-facing side is scorched by temperatures of around 430°C, hot enough to melt lead. Without a substantial atmosphere to distribute heat away from the areas facing the ...

Astronomers have peered through the atmosphere of a planet beyond the Solar System, mapping its 3D structure for the first time. By combining all four telescope units of the European Southern ...

The atmosphere of a distant world has been mapped in detail for the first time, revealing a strange, topsy-turvy weather system, with the fastest winds ever seen inexplicably blowing around the ...

Its atmosphere is mainly composed of hydrogen and helium ... It is about a third closer to its star than our solar system's innermost planet Mercury is to the sun - so close that it completes an orbit ...

Get Instant Summarized Text (Gist) Astronomers have mapped the 3D structure of an exoplanet's atmosphere for the first time, revealing complex weather patterns on WASP-121b, an ultra-hot Jupiter ...