Jupiter

This type of moon marks the start of the winter astronomical calendar.

The gas giants appeared to come closer than they had done for almost 400 years on Monday, days before Christmas.

Jupiter and Saturn are set to appear close together in the sky in a major celestial event known as the Great Conjunction.

This year's December solstice will coincide with the bright planets forming what has been dubbed a "Christmas star."

Saturn and Jupiter will be at their closest for 400 years on December 21.

Great conjunctions of Jupiter and Saturn are rare, occurring once every two decades or so.

In the Northern Hemisphere, the September equinox marks the beginning of what's set to be quite an eventful astronomical fall.

Two of Saturn's many moons, Mimas and Enceladus, can be seen in the Hubble image.

If you want to see the spectacle, you will need to head outside around an hour before sunrise on Sunday.

"It's incredible to be able to make these kinds of discoveries," said researcher David Armstrong.

"Maybe Kepler-88 d is the new supreme monarch of this planetary empire, the empress," said astronomer Lauren Weiss.

Meteor showers are celestial events in which several shooting stars appear to originate from a single point in the sky.

"These selected missions have the potential to transform our understanding of some of the solar system's most active and complex worlds," NASA's Thomas Zurbuchen said.

Loki Patera is located on Jupiter's moon Io, one of the most volcanically active places in the solar system.

The planet, HR 5183 b, is three times the size of Jupiter and slingshots around its star along an egg-shaped orbit.

The latest findings could help to explain some puzzling measurements collected by the Juno spacecraft, which is currently orbiting the planet.

Nieves penitentes on Earth's second highest volcano could offer insight in the search for extraterrestrial life.

Police say a man called Louis Rivera, 65, had been stabbed outside his home after being confronted by James Dorcilien, 32, identified as a former employee. In response, he shot him.

The full moon on Sunday will also coincide with Jupiter appearing particularly bright and large in the night sky.

The ocean is thought to be be billions of years old and may contain as much as three times the volume of all the liquid water on Earth.

NASA's James Webb Telescope will open up an entirely new avenue for searching for extraterrestrial life.

At its closest, the planet's orbit will take it within around 398 million miles of Earth on June 12.

"The formation of the moon and the origin of Earth's water are two of the fundamental open questions in cosmo-chemistry," said the lead author of a new study.

Patriots-hating NFL fans and critics of President Donald Trump have intersected at a Florida day spa that's at the center of a prostitution and human-trafficking investigation, where New England Patriots owner Robert Kraft had allegedly been a customer.

The clouds surround a circular feature inside a jet stream region.

The breakthrough could help researchers recreate the states found inside white dwarf stars.

One of the waves is estimated to be around six miles high.

Full alignment will be easier to see from the Southern Hemisphere—but people at Northern latitudes should still be able to spot Mars, Saturn and Jupiter.

It shows the cloud formations as well as the "brown barge."

These ancient rocks are relics of the early solar system.