Ever since the dawn of the Space Age, humans have been obsessed with boundaries—between planets, between galaxies, and perhaps most importantly, between Earth and Space. Where does our atmosphere end ...

According to NASA, the planetary phenomenon will be clearest about 45 minutes before sunrise, low in the eastern sky and appearing near the moon. Venus and Saturn will be the easiest to spot — but for ...

When we observe the night sky, the planets, stars and galaxies appear to be close together. We know that some objects are closer to the Earth than others and that enormous distances separate us ...

This dazzling planet, which dominated the evening sky from last fall on through the ... Mars also continues to gradually fade as it recedes from the Earth. During April its distance from Earth ...

"We're standing on the Khumbu Glacier right now and although it looks a rather static sight and quite beautiful with blue pinnacles and a deep blue sky with ... with huge gaps separating ice ...

Light is then reflected off the frozen fuel, making it visible on Earth. Watch: What caused the unusual display in the sky above the UK? Astronomer Allan Trow said it had appeared above Wales's ...