Light Pollution From Satellites Will Get Worse. But How Much?

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An artist's depiction of space junk. (Credit: ESA) SpaceX’s ambitious Starlink project could eventually launch more than 10,000 satellites into orbit and rewrite the future of the internet. But Elon Musk’s company has been taking heat from the astronomical community after an initial launch in late May released the first 60 satellites. The 500 pound (227 kg) satellites were clearly visible in Earth’s night sky, inspiring concern that they could increase light pollution, ...read more

Human Skull Trophies Help Uncover the Maya’s Mysterious Collapse

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Temple 1 at the ancient Maya city of Tikal in Guatemala. (Credit: Rob Crandall/Shutterstock) Two trophy skulls, recently discovered by archaeologists in the jungles of Belize, may help shed light on the little-understood collapse of the once powerful Classic Maya civilization. The defleshed and painted human skulls, meant to be worn around the neck as pendants, were buried with a warrior over a thousand years ago at Pacbitun, a Maya city. They likely represent gruesome symbols of military ...read more

Stepping Up the Search for Intermediate-Mass Black Holes

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Astronomers think the galaxy NGC1313 may be home to an intermediate-mass black hole. Credit: Gemini Observatory/AURA) (Inside Science) -- If you have a computer and a few spare moments, you can help search the cosmos for an elusive breed of black hole that astronomers once thought didn't exist. Black holes come in two main types: stellar-mass black holes, which generally have about 10-24 times the mass of our sun, and the much heavier variant known as supermassive black holes, which c ...read more

Did Dark Matter Punch a Hole in the Milky Way?

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An artist's rendition shows the dark matter halo (blue) that astronomers believe surrounds the Milky Way. (Credit: ESO/L. Calçada) A massive clump of dark matter may have plowed through a conga line of stars streaming around the Milky Way, according to new research presented Tuesday at the 234th Meeting of the American Astronomical Society. The research, led by Ana Bonaca of the Harvard-Smithsonian Center for Astrophysics, reveals a curious abnormality in an otherwise uniform strea ...read more

As the Hunt Drags Out, Physicists Start Searching for the Lightest Dark Matter

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The Large Underground Xenon experiment in South Dakota is one of many projects searching for dark matter and coming up empty. (Credit: LUX Collaboration) Dark matter, the invisible material that so far shows itself only through the pull of its gravity, was first proposed nearly a century ago. It took another half-century to truly ignite the physics community. But at this point, a plethora of highly advanced projects have gone hunting for dark matter and come up empty. Now scientists arou ...read more

As Pollinator Populations Drop, Hoverflies May Offer Britain Hope

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A hoverfly on a cluster of yellow mustard flowers. (Credit: Dave Hansche/Shutterstock) Billions of hoverflies from Europe descend on southern Britain each spring. The black and yellow striped bugs are no more than half an inch in length but make the long trek to Britain for the summer. Once they arrive, the hoverflies pollinate flowers and lay eggs. The fly populations have remained stable unlike those of honeybees and other insects, which have dropped in recent years, researchers fi ...read more

The Milky Way Has Battle Scars from Colliding With a Ghostly Galaxy

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Our Milky Way, shown here in an artist's concept, has strange "ripples" in its outlying regions. New research indicates those ripples were caused by a collision with a dwarf galaxy called Antlia 2. (Credit: ESA) The Milky Way likely collided with a recently discovered dwarf galaxy called Antlia 2 less than a billion years ago, according to new research presented Wednesday at the 234th Meeting of the American Astronomical Society.  The research, spearheaded by Sukanya Chakrabarti& ...read more

Two Hours in Nature Each Week Could Be All You Need to See Health Benefits

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(Credit: photo-nic.co.uk nic/Unsplash) By now, you probably know that spending time in nature — hiking through a forest, walking through a park, even hanging out on a beach — is good for your health. There has been many a study on how outside time can lower a person’s risk for developing things like Type 2 diabetes and cardiovascular disease, and can alleviate symptoms of some mood and mental disorders. Now, researchers have begun to quantify how much time you’d ne ...read more

NASA is Retiring Its Legendary Spitzer Space Telescope

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The Iris Nebula is captured here by Spitzer. (Credit: NASA/JPL-Caltech) NASA's Spitzer Space Telescope was launched in 2003 on a mission to spend five years exploring the cosmos in infrared light. That means it excels at capturing images and chemical signatures of warm objects, like the glow of gas in nebulas and galaxies, or the composition of planets in still-forming alien solar systems. It even found a new ring of Saturn. In recent years, it’s been operating with just one instrum ...read more

Why Do Zebras Have Stripes? Maybe to Help Keep Cool

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(Credit: Ehrman Photographic/Shutterstock) (Inside Science) -- A gangrene-inducing bite in Africa, 40 years of curiosity, and backyard experiments her daughters still complain about have all come together to tell Alison Cobb one thing: Stripes help zebras keep their cool. New research published this week in the Journal of Natural History shows stripes may create air flows that give zebras a kind of natural air conditioning system that helps them ward off the blazing s ...read more

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