The giant galaxy around the giant black hole

On April 10, 2019, the Event Horizon Telescope (EHT) unveiled the first-ever image of a black hole's event horizon, the area beyond which light cannot escape the immense gravity of the black hole. That giant black hole, with ...

'Space butterfly' is home to hundreds of baby stars

What looks like a red butterfly in space is in reality a nursery for hundreds of baby stars, revealed in this infrared image from NASA's Spitzer Space Telescope. Officially named Westerhout 40 (W40), the butterfly is a nebula—a ...

Discovering a brown dwarf binary star with microlensing

Brown dwarfs are stars less massive than the sun and unable to burn hydrogen. They comprise (at least in mass) a bridge between planets and stars, and astronomers think that they form and evolve in ways different from either ...

Stars shrouded in iron dust

The Instituto de Astrofísica de Canarias (IAC) has participated in the discovery of a group of metal-poor stars shrouded in a large amount of iron dust situated in the Large Magellanic Cloud. This study involved a combination ...

NASA Learns More About Interstellar Visitor 'Oumuamua

In November 2017, scientists pointed NASA's Spitzer Space Telescope toward the object known as 'Oumuamua—the first known interstellar object to visit our solar system. The infrared Spitzer was one of many telescopes pointed ...

Image: Newborn stars blow bubbles in the Cat's Paw Nebula

This image from NASA's Spitzer Space Telescope shows the Cat's Paw Nebula, so named for the large, round features that create the impression of a feline footprint. The nebula is a star-forming region in the Milky Way galaxy, ...

'Oumuamua one year later

One year ago this week astronomers discovered an unusual object moving through space not too far from the Earth's orbit. In just a few days they realized it could not be a normal asteroid or comet – its path showed that ...

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