Why was Pluto reclassified as a dwarf planet? One might think that it’s purely a matter of size. Mercury, the smallest of the ...

Everyone's favorite dwarf planet, Pluto, was discovered just 95 years ago. Here's the story of how the once-ninth planet was ...

Future missions to Venus could also supply additional data on the density and temperature of the planet's crust, which could ...

Venus—a hot planet pocked with tens of thousands of volcanoes—may be even more geologically active near its surface than ...

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Decades of constant X-ray emission from the Helix Nebula’s white dwarf suggest debris from a Jupiter-sized planet steadily rains upon the star.

I had no idea at all.

"As the large and bright discs are the easiest to observe, our previous view of the birth site of planets was biased." ...

Chun Wang, a Chinese-born crypto entrepreneur, paid an undisclosed amount for the mission. Some satellites are already in polar orbit, and researchers called it a routine flight.