A new trail in this southern Arizona city plots the most visitor-friendly astronomy stops—and there are plenty to choose from ...

Astronomers have found thousands of exoplanets — worlds beyond our solar system. Most of them are in single-star systems, ...

So in some sense, alien worlds were not first discovered in the 1990s or even the 1980s. It took nearly a century to fully understand it, but the first evidence for exoplanets was found in 1917.

Scientists are using an array of instruments to detect other planets, some of which may harbor life—and others that most ...

Here's where the James Webb Space Telescope comes in. Its advanced technology, including its large mirror and suite of specialized instruments, allows it to detect very faint emissions coming from ...

A marbled sphere, swirled in colors of maroon, rust, and cream ... Tucson-area observatories and research institutions ...

This also isn't helped by the fact that most exoplanets are incredibly far away ... also revealed unexpected diversity in the "colors" of the HR 8799 system's inner planets.

This is how long it would take a jet travelling at 600mph to get to K2-18b, a planet that may (or may not) have alien life.

The background image of the sky is compiled from data from more than 1.8 billion stars. It shows the total brightness and color of stars ... and helping discover exoplanets and black holes.

The science behind the colours of a rainbow is a reminder of the wonders of the original quantum designer In the fifth ...