Mars will appear to make an ultraclose approach to the moon on Sunday, after Jupiter had a turn earlier this week. Here's how to get the best view of the rare conjunction.

Possibly one of the best-known constellations in the northern sky, Ursa Major—or the Great Bear—contains an asterism of seven ...

President Trump’s looming trade war weighed on stocks as companies scramble to adjust their supply chains. On Monday, the U.S. struck last-minute deals with Mexico and Canada to delay new 25% ...

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Coronal holes in the Sun continue to send solar wind toward Earth, increasing the chances of Northern Lights across the northern U.S. this week, according to the latest space weather forecast.

The moon's ascending node (the point in the sky where its orbit crosses the ecliptic from south to north) is moving westward ...

President Donald Trump’s tariffs sent Wall Street on a roller coaster. The S&P 500 fell 0.8% Monday following sharper loses across Asia and Europe. The Dow Jones Industrial Average fell ...