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NASA astronaut ... to Earth on Tuesday (Jan. 14) when it came within 88 million miles (142 million kilometers) of our planet. A day earlier, it reached perihelion, its closest point to the sun ...

So I grabbed my camera, ran outside, and looked up just as Mars was supposed to emerge from the Moon's curved horizon. Seen ...

circles that are arranged concentrically around the sun and lie on the same plane. (If you viewed them edge-on, you would see only a line.) However, none of the eight planets, including Earth ...

But do we know which way Earth is spinning? And is it the same direction as the sun and the other planets circling it? The answer is linked to the formation of the solar system some 4.6 billion ...

The astronauts ... planet. A new simulation suggests how it ended up there. NASA officials revised the Mars Sample Return mission to reduce the budget and bring red planet rocks to Earth sooner ...

Nasa wants to send humans to Mars as early as the 2030s: a journey that would take around nine whole months. The red planet ... away from Earth, and is the fourth closest to the Sun.

"Chemical rockets that we use today, even with the extra speed boost from flying by planets, or from swinging by the sun for ...

Satellite data show the shape of a wave as water sloshed around Dickson Fjord ... of year again…Tournament Earth is back! This time, the theme is astronaut photography. For more than 20 years, ...

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