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Image via NASA

Mystery of sun’s coronal heating

Exploding “heat bombs” might explain why the sun’s upper atmosphere, or corona, sizzles at millions of degrees – hundreds of times hotter than at the surface.

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It’s a bird, a plane, the tiniest asteroid!

Asteroid 2015 TC25 is small enough to be straddled by a person, reminiscent of the iconic bomb-riding scene in the movie Dr. Strangelove. It swept between us and the moon a year ago.

Hurricane Sandy 2012 via NASA

Hurricane risk to US northeast coast

Due to shifting weather patterns, the northeastern coast of the United Sates could see more frequent and more powerful hurricanes in the future, says new research.

Image via NASA.gov

What would Earth be like with no moon?

Earth without its moon would be a very different world indeed. No eclipses. Smaller tides. But the biggest change would be in the length of Earth’s day.

Image via NOAA

2016-17 winter outlook for US

NOAA’s outlook for this winter predicts a warmer, drier South, and cooler, wetter North. Drought is expected to persist in California and expand in the Southeast.

A mile-wide (1.4 km) crater on the rim of a larger crater near Mars' equator, as seen from CaSSIS. Image via University of Bern.

First images from ExoMars mission

A camera on board ESA’s ExoMars mission has returned its first images from orbit. It was meant to be a test, but the images are spectacular.

Comparison of an ultra-diffuse galaxy with the nearby Andromeda galaxy, an ordinary spiral galaxy and our Milky Way's nearest large neighbor.

Supernovas and ultra-diffuse galaxies

These strange galaxies have 1,000 times fewer stars than the Milky Way, yet occupy a large space. Astronomers used an advanced computer simulation to show that supernova explosions helped create them.

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Signs of climate change at Arctic tree line

Near the Arctic Circle, in northern Alaska, is where forests give way to tundra. Researchers are looking at how the warming climate might affect the ecology of this northern boundary.

Cassini will soon begin a series of 20 orbits that fly high above and below Saturn's poles, plunging just past the outer edge of the main rings. Image via NASA JPL/ Caltech/ Space Science Institute.

Saturn spacecraft prepares to ring-graze

On November 30, the Cassini spacecraft will begin a series of 20 orbits that fly high above and below Saturn’s poles, plunging just past the outer edge of the main rings.

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GoPros go to edge of space

Photog Adventures sent its GoPros to space, captured some stunning views, and then lost the cameras for 15 days. Follow the adventure in this video.

Discoveries indicate mass fishing and therefore a semi-permanent settlement. Image via Arne Sjöström

An underwater Stone Age settlement

Researchers have now mapped a preserved underwater site off the coast of Sweden. They think it was a lagoon where Mesolithic humans lived during parts of the year.

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Great Valley found on Mercury

Scientists have discovered a Great Valley on Mercury, hundreds of miles long and sunken by as much as 2 miles (3 km) below the surrounding terrain.

Image via NASA/JPL-Caltech/Space Science Institute

Watch summer clouds on Titan

Time-lapse by the Cassini spacecraft shows methane clouds moving across northern regions of Saturn’s largest moon, Titan, on October 29­­­­ and 30.

Arctic sea ice in 2016. Image via NASA

Decline of Arctic’s thickest sea ice

The Arctic’s multi-year sea ice – ice that survives the summer melt – is weaker and there’s less of it. Satellite images show the difference between 1984 and now.

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Spacecraft catches partial solar eclipse

On Sunday, October 30, NASA’s Solar Dynamics Observatory caught the moon passing in front of the sun.

This artist's concept illustrates how the most extreme "pumpkin star" found by Kepler and Swift compares with the sun. Both stars are shown to scale. KSw 71 is larger, cooler and redder than the sun and rotates four times faster. Rapid spin causes the star to flatten into a pumpkin shape, which results in brighter poles and a darker equator. Rapid rotation also drives increased levels of stellar activity such as starspots, flares and prominences, producing X-ray emission over 4,000 times more intense than the peak emission from the sun. KSw 71 is thought to have recently formed following the merger of two sun-like stars in a close binary system. Image via NASA's Goddard Space Flight Center/Francis Reddy

Check out fast-spinning ‘pumpkin’ stars

These stars produce X-rays at 100 times our sun’s peak levels. They spin so fast they’ve been squashed into pumpkin-like shapes.

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Science fights to control fire ants

Thinking of the ant colony as a superorganism, entomologist Patricia Pietrantonio is searching for the master regulator genes that may help control them.

Image Credit: NASA/JHUAPL/SwRI

New Horizons returns last of Pluto data

Remember when they said it would take more than a year for New Horizons to send its data back from Pluto? Now, say scientists, “We have our pot of gold.”

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Astronomers to observe Tabby’s Star

Observations begin tonight with the Green Bank radio telescope. Astronomers are seeking evidence of an extraterrestrial civilization.

Image via trasroid/Flickr

Bees can learn to pull strings for food

Learning to pull strings for food is often used to test the intelligence of apes and birds. Turns out, bees can learn it too, and pass the skill on to other bees.