Mercury is a planet of extremes. It’s the closest planet to the Sun, but it’s not the hottest planet in the solar system. It’s a world where daytime temperatures can melt lead, but ice may ...

Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

frigid craters that may hold ice dozens of feet thick, even though Mercury is the closest planet to the sun. Mercury's surface can reach a blistering 800 degrees Fahrenheit (430 degrees Celsius ...

But of these planets, which is nearest to the sun? Mercury is a strange little world. There are some craters on its surface that never see sunlight. It also has the most extreme temperatures of ...

In a celestial event known as a great alignment the five planets will be discernible with the naked eye, but to see Neptune ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Thus, the discovery of oxygen’s signature in the atmosphere of an extrasolar planet would be significant. Mercury lacks an atmosphere to speak of. Even though most of its surface is very hot, there is ...

Credit: ESA/BepiColombo/MTM ESA’s BepiColombo spacecraft is currently undertaking a series of gravity-assisted maneuvers around Mercury, capturing increasingly close-up images of this enigmatic planet ...

Mercury will reach its peak visibility from ... of continuous sunlight followed by 42 years of darkness. The planet is an ice giant, made up of methane, hydrogen, and helium.

Our solar system’s planets are set to align in a seven-strong planetary parade this week that will be visible in the night ...