The cosmological principle predicts uniformity, and the CMB dipole reflects our 370 km/s motion that radio counts should ...

On Saturday (Jan. 10), for example, we will see three satellites on one side of Jupiter (going outward from the planet: Ganymede, Io and Europa ), while the fourth ( Callisto) remains all by itself on ...

Long before humans walked the Earth, your solar system had a brush with two blazing blue stars that passed surprisingly close ...

Solar physicists say they have found a key source of intense gamma rays unleashed when Earth’s nearest star produces its most ...

Hubble images from December 2025 show interstellar object 3I/ATLAS releasing two narrow jets of material as it moves away from the Sun, raising questions about rotation and activity ...

The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space telescopes and orbiters have been documenting the rare visit. A mysterious ...

In the vast calm of the solar system, planetary orbits often appear orderly, stable, and insulated from the broader mechanics ...

Could the icy moons of our solar system hold life beyond our planet? Keith Cooper looks at how planetary scientists plan to ...

Australia’s solar future is smarter, more flexible, and more controlled. In 2026, value comes from how systems behave on the ...

Earth may owe some of its properties to a nearby star that blew up just as the solar system was forming. This pattern, which saw a supernova bubble envelop the sun and shower it with cosmic rays, may ...

Pre-discovery archives have only added to the confusion. It turns out 3I/ATLAS may have been active even further out, beyond ...

The newly identified cluster of Kuiper Belt objects lies about 4 billion miles from the Sun, offering fresh clues about how ...