Eight new repeating radio signals detected from deep space

The CHIME radio telescope has picked up eight new repeating fast radio bursts

Fast radio bursts (FRBs) are one of the most intriguing mysteries of modern astronomy. Picked up from all corners of the cosmos, these perplexing radio signals usually only last milliseconds before fading forever, but some particularly strange ones repeat on an irregular basis. Now the catalog of repeaters has grown substantially, as astronomers have detected a whopping eight new repeating signals.

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NASA selects proposals for smallsats built to study deep space

NASA is expanding plans to use small satellites (aka smallsats) to explore the Solar System. The agency has picked two proposals for smallsat technology that would improve observations in deep space, where they could help improve models that predict...

Gravitational waves point to a black hole swallowing a neutron star

An artist's rendition of a black hole beginning to devour a neutron star

Astronomers have detected a gravitational wave signal that appears to have been caused by a black hole swallowing a neutron star. Aside from being an incredible cosmic cataclysm to witness, this detection is important for another reason: it may be the final point in the gravitational wave trifecta.

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Virtual universes study suggests habitable Earth-like exoplanets are more common than we thought

An artist's impression of Kepler-452b, a perfect example of an Earth-like exoplanet orbiting a Sun-like star ...

Earth is – for now – the only place in the universe that we know hosts life, so it makes sense that astronomers focus the search for alien life on worlds that are the most like our own. But just how common are Earth-like planets orbiting at comfortable distances from their stars? Researchers on a new study claim to have come up with the most accurate estimate yet – and they're more common than you might think.

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An ancient planet, 10 times bigger than Earth, may have crashed into Jupiter

An artist's impression of a collision between Jupiter and a large, ancient planetoid that would have ...

Jupiter is a gigantic ball of churning gas clouds, and that makes it hard to see what's in the middle. It's believed to be a relatively small, rocky core, but data from the Juno probe found that it's less dense and more spread out than expected. Now, astronomers believe they have an answer – a huge ancient planet, with 10 times the mass of Earth, crashed into the gas giant in the early days of the solar system.

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Long-missing, potentially dangerous asteroid finally rediscovered – and it won't hit Earth

An artist's rendition of an asteroid swinging past Earth

Of all the things you don't want to lose, an asteroid with a chance of striking Earth is pretty high up the list. A space rock called 2006 QV89 has been missing in action for 13 years, after it was discovered to be on an orbit that regularly brought it too close to Earth for comfort. Now astronomers have finally found it again, and ruled out an impact within the next century.

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Yale simulations probe the unstable recipe behind "intergalactic pancakes"

A simulation of temperatures in the intergalactic gas, where red is hotter and blue is colder

Galaxies are well studied, but far less is known about the vast stretches of space between them. Though it seems empty, the intergalactic medium (IGM) actually contains more matter than galaxies do – it's just hard to see because it's not shining bright as stars. Now, astronomers have used simulations to reveal new details about the structure of this matter, showing that "intergalactic pancakes" spanning millions of light-years tend to collapse into a cosmic fog.

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