Because, following a string of remarkable discoveries over the past two decades, the idea of alien life is not as far-fetched as it used to seem.

The long, shallow grooves lining the surface of Phobos are likely early signs of the structural failure that will ultimately destroy this moon of Mars.

Astronomers have made the most precise measurement to date of the rate at which the universe is expanding. But there’s also some unsettling news: The new number remains at odds with independent measurements of the early universe’s expansion, which could mean that there is something unknown about the makeup of the universe.

Scientists discovered the cause of an ancient ice age that might help us in our fight against climate change

Popular science fiction of the early 20th century depicted Venus as some kind of wonderland of pleasantly warm temperatures, forests, swamps and even dinosaurs. In 1950, the Hayden Planetarium at the American Natural History Museum were soliciting reservations for the first space tourism mission, well before the modern era of Blue Origins, SpaceX and Virgin Galactic. All you had to do was supply your address and tick the box for your preferred destination, which included Venus.

Researchers took a look at the third Gaia space telescope data release. They uncovered several exciting phenomena, including evidence for a significant event that took place relatively recently in our home galaxy. Moreover, astronomers were able to clearly observe our home galaxy's outer side for the first time.

After re-analyzing existing Hubble data, astronomers have determined that the extremely faint galaxy Dragonfly 44 has far fewer star clusters in its surrounding dark matter halo than reported previously

The Event Horizon Telescope (EHT) team that published the first-ever image of a black hole last year has now used its newly gained knowledge to analyze archival data

An international team of astronomers has uncovered the remains of an ancient collection of stars pulled apart by the Milky Way more than two billion years ago.

Findings might help uncover more about our Moon's mysterious origin story.

Up until now, astronomers have mainly looked at fairly mature protoplanetary disks around young stars that are 1 to 3 million years old, it turns out that planet formation starts much earlier.