U of A Regents Professor Dante Lauretta says he is "amazed by the discoveries we've made" since the OSIRIS-REx spacecraft delivered an asteroid sample to Earth last year.

Sept. 22 marks the official first day of fall this year, but that's not always the case. The start of fall and spring is determined by an astronomical phenomenon called an equinox, when the sun is positioned exactly above Earth's equator. Jose Daniel Castro-Cisneros, a physics graduate student, explains how equinoxes work.

Students have been preparing since 2016 for the launch of CatSat, a student-built small satellite also known as a CubeSat, that will collect data about space weather.

OSIRIS-REx sample scientists took a deep dive into the rocks and dust returned from asteroid Bennu. They found that the sample is rich in carbon, nitrogen and organic compounds – essential components for life as we know it.

In the Best Global Universities rankings, UArizona earned its best scores in space sciences, ranking No. 8 overall, No. 6 in the U.S. and No. 2 among public universities.

Using data from the James Webb Space Telescope, researchers have discovered about 80 new supernovas. Their findings provide a new window into the early universe.

The Snow4Flow mission, led by professor Jack Holt, will measure glaciers' ice and snow thickness and help scientists better predict how glacial melting contributes to sea level change.

A team of astronomers, including UArizona scientists, used the telescope to study the disk of gas and dust around a young, low-mass star.

Astronomers have captured a volcanic event on Jupiter's moon Io at a resolution never before achieved with Earth-based observations.

Researchers have discovered the most distant galaxy ever detected. The secrets it contains challenge previous assumptions about galactic evolution.