2 'potentially hazardous' asteroids will streak by Earth this week, one as big as a mountain. You can watch it live.

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An asteroid floats above Earth
Two different "potentially hazardous" asteroids will fly by Earth this week. Both will be rare and spectacular events, but they won't threaten Earth.

buradaki/Getty Images

NASA is putting an 'artificial star' in orbit around Earth

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Illustration of Earth as seen far from space with stars in the background
NASA aims to launch a mini satellite the size of a bread box that could become one of the most important astronomical tools by the end of this decade.

RomoloTavani/Getty Images

Astronomers Witness a Supermassive Black Hole Roaring to Life

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Five years ago, a galaxy 300 million light-years away got a lot brighter in telescopes, radiating ultraviolet, optical, and infrared light out into space. This year, the resurgent galaxy started emitting X-rays, indicating that its initial brightening was really just a warmup.

A mysterious Jupiter-sized planet that shouldn't exist is as puffy as a marshmallow and astronomers finally think they know why

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Artist's cocept of exoplanet WASP 107b imaged by
This artist's illustration shows what exoplanet WASP 107b could look like based on new data from JWST. This warm gas giant confounded researchers until recently.

NASA, ESA, CSA, Ralf Crawford (STScI)

Astronomers say we may live at the center of a cosmic void 2 billion light-years wide that defies the laws of cosmology

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The KBC void
New research suggests the KBC void is a 2 billion light-year-wide expanse of relatively empty space, and our galaxy sits right near the center of it.

Pablo Carlos Budassi / Wikimedia Commons

A 'severe' geomagnetic storm is forecast for Earth for the first time in years — here's what to know about these storms

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Satellite image of the sun's corona
NOAA's GOES-16 satellite captured this image of activity in the sun's corona on May 10.

NOAA

The first severe solar storm in 20 years could spark aurora across the US

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Aurora
Aurora are usually contained to the uppermost art of the Northern Hemisphere. But US states as far south as Michigan may be able to see them this Friday.

George Lepp/Getty Images

The Ancient Egyptians May Have Seen the Milky Way as a Celestial Deity

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The massive galaxy that houses our star system, along with hundreds of billions of other stars, appears as a shimmery splotch stretching across our night skies on clear, moonless nights. For an ancient people who were rather obsessed with the cosmos, looking up at the Milky Way may have symbolized a goddess that hangs…

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An expert who has seen 30 solar eclipses made my first experience with one breathtaking

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The solar eclipse viewed from Indiana in 2024
The April 8 total solar eclipse as seen from Bloomington, Indiana.

JOSH EDELSON/AFP via Getty Images

How to watch the best views of the solar eclipse for free online

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Solar eclipse photo
The rare astronomical event won't occur for another 20 years after April 8.

Jorge Villalba/Getty

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