However, while no such events took place on that date, nor on his revised date of Dec. 25, 1919, the seeds of anxiety and ...

How many planets are there? As with the discovery of Uranus, the answer depends on who you ask. Detail from Joseph Wright of ...

While the grand spectacle takes place next month, six of the seven planets will appear in the sky at once in a large ...

"BepiColombo's main mission phase may only start two years from now, but all six of its flybys of Mercury have given us invaluable new information about the little-explored planet." ...

A very rare treat is about to grace Earth's night skies.

In 1998, a photo taken from the International Space Station showed a black, oddly shaped object which became known as the ...

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The higher the eccentricity, the more elliptical the orbit.Credit...Terry Virts/Johnson Space Center, via NASA Even as the Northern Hemisphere experiences the heat of summer, our planet is at ...

Such displays are often called “planet alignments,” although the term is a bit misleading. Planets always appear along the ecliptic, the plane of the solar system where they orbit the Sun. This ...

Shortly before Christmas, a US Air Force weather satellite shattered into 50 pieces: one of four recent ‘fragmentation’ events in orbit that have experts raising the alarm about ... launched in the ...

Planetary geologists like me are interested ... achieving the mission's primary goal of reaching orbit. Science News // 15 hours ago K2 Space names former Pentagon official head of space policy ...