Supermassive black holes usually lurk unseen, but when an unlucky star drifts too close they ignite titanic outbursts ...

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The new moon occurs on June 25. A day later, Mercury reaches its highest point in the evening sky, and on June 27, the young moon will make a close pass to the planet.

Addeddate 2012-04-27 19:49:44 Call number 6925219 Camera Canon EOS 5D Mark II External-identifier urn:oclc:record:1157230254 Foldoutcount 0 Identifier smithsillustrat00smit Identifier-ark ...

The Solar Orbiter has captured the first-ever views of the sun's south pole. ESA & NASA / Solar Orbiter / EUI Team, D. Berghmans (ROB), via ESA Standard Licence Though humans have been observing ...

In about five years, the sun will slip into its next quiet phase, known as the solar minimum—a time when its magnetic field settles into order and surface activity calms. Yet despite decades of ...

“When the sun is at its minimum, you have a north pole and a south pole, each with its own magnetic polarity,” said Anik De Groof, Solar Orbiter’s mission manager.

Earth’s tilt is what causes the seasons; in the summer, when our planet’s pole is tipped toward the sun, the days are longer, and the true sun’s daily path across the sky is higher. The opposite is ...