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Probing the cosmic Dark Ages from the far side of the moon
To detect ancient whispers from the cosmic Dark Ages – the years after the Big Bang – we need a radio telescope in a quiet place. On Earth, our electronics...
Small planets are common around small stars, says new study
Exoplanets with masses similar to Earth are common in our galaxy. These planets are especially common around low-mass stars such as red dwarfs, researchers...
The Northern Cross: Find the backbone of the Milky Way
How to find the Northern Cross The Northern Cross is a clipped version of the constellation Cygnus the Swan. It’s an asterism, or pattern of stars that...
Human dam-building has caused a small (but astonishing) pole shift
The American Geophysical Union published this story originally on July 8, 2025. Edits by EarthSky. Two surges in human dam-building Over the past two...
Airport radar could signal our existence to aliens
Airport radars around the world leak electromagnetic energy into space. That energy is strong enough that alien civilizations could detect it from 2...
Earth could be in a void, Big Bang sound waves suggest
Earth could be located inside a nearly 2-billion-light-year-wide void, astronomers say. This could explain the Hubble tension, or disagreements in measurements...
A deep-space navigation first, from New Horizons
The New Horizons spacecraft, which has left the solar system, beamed back images that have led to the first test of deep-space navigation. That is, New...
New clues to how galaxies sustain star formation
Scientists found high-velocity gas clouds in the galaxy Messier 83 that likely came from outside the galaxy. These clouds consist of dense molecular...
Rho Ophiuchi is filled with glorious color
The colorful world of Rho Ophiuchi The Rho Ophiuchi cloud complex is one of the most colorful areas of the night sky. Therefore, it’s a favorite target...
Scorpius the Scorpion is a summertime delight
With a little imagination, you can see the stars of Scorpius tracing the shape of a scorpion. The bright red star Antares marks the Scorpion’s Heart....
Lyra the Harp contains Vega, a summer gem
Yes, Lyra is a small constellation, 52nd out of the 88 constellations. But it has a big presence. That’s because its bright star Vega is prominent in...
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