A rainbow-like halo surrounded the sun over Mexico City on Thursday, an optical phenomenon that triggered a social media frenzy.
The low rates of sunscreen use likely mean the high rates of the most common cancer -- melanoma -- won't be dropping soon. Continue reading →
Astronomers studying stars like our sun that are known to generate powerful 'superflares' have also discovered that these superflares are likely associated with monster 'starspots.'
This beautiful portrait of our nearest star was captured by NASA's Solar Dynamics Observatory (SDO), picking out the powerful and elegant loops of magnetized plasma reaching high into the sun's corona.
Astronomers have taken a census of distant spiral galaxies to help us understand what our Milky Way may have looked like in the distant past, also providing us with an invaluable look at the evolution of our own solar system.
Transport yourself to Mars and stare in wonder at these stunning views of Red Planet sunsets through our robotic explorers' eyes.
Turnabout is fair play: The full moon will be totally eclipsed early Saturday morning (April 4), just 15 days after it caused a total eclipse of the sun.
The first day of Spring began with some dazzle in Europe and the Arctic with a solar eclipse.
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