Whether aliens could detect our modern civilization depends on what signs they’re looking for—and, crucially, their distance ...

to slingshot a spacecraft outwards can reduce the travel time dramatically Reaching the outer planets with a spacecraft is difficult because these worlds are so far away, billions of miles ...

Astronomers have identified a quartet of small rocky planets orbiting Barnard's star - one of our closest stellar neighbors - ...

A planet parade is when several of our solar ... However, Neptune and Uranus are simply too far away to spot. Astronomers note that you'll likely need a telescope with at least an 8-inch aperture ...

The other two planets are too far away to be seen without binoculars or a telescope. Uranus is about two fists west of Jupiter, Mr. Willmitch said, while Neptune is hiding between Venus and the ...

It’s nestled at the perfect distance from the sun to allow ... to hunt for these transit events which give away the location of potential planets. TESS, seen here prior to launch, is NASA ...

That's not just because it's too far away. In 2006, the International Astronomical Union (IAS) reclassified Pluto as a dwarf planet. That decision came several years after discovering the Kuiper ...

To view the alignment, you should find a place with a clear view of the horizon far away from light pollution, StarWalk says. The planets will be observable for a few hours after it gets dark.