The clouds reflect 70 percent of the sunlight that reaches Venus. Venus is nicknamed the "evening star" and the "morning star ...

The Sun sets differently on Mars. Part of that is due to its distance from the star (an average of 142 million miles versus ...

At the surface, Mars is a desolate, barren world with a rocky landscape, massive dust storms and extreme temperature swings.

Curiosity, a set of NASA 's robotic "eyes" on the Red Planet, recorded 16 minutes of so-called noctilucent clouds flying ...

This lovely evening sky was photographed over a Sacramento neighborhood in early January. Thank you, Claus Weisemann, for ...

Contrails conjure a sense of something overwhelming and ineffable, as terrifying as it is beautiful.

A recent video created from images captured by Curiosity shows clouds tinted red and green flowing though the sky over Mars.

Around the time of your romantic dinner, head outside and look to the southwest to spot the super brilliant planet in the night sky ...

Readers’ photos celebrate sunrises and sunsets, when the light is the most pleasing. Fifty-one photos were sent in; here are ...

The beautiful planetary parade continues through the end of the month, with special guest Mercury joining the pack soon.

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

Watch a bright Moon dominate the sky, trace the Winter Hexagon, and continue enjoying the evening parade of planets in the ...