NASA's Voyager 1 spacecraft discovered active volcanoes on Jupiter's moon Io. Before Voyager 1 flew by Io, scientists believed the moon to be a dead world much like Earth's moon. The mission ...

Scientists estimate there are ~1 septillion (1 followed by 24 zeros) planets in the observable universe. This figure is based ...

34,734 people played the daily Crossword recently. Can you solve it faster than others?34,734 people played the daily Crossword recently. Can you solve it faster than others?

The Moon might look calm and quiet now, but long ago, it was a fiery ball of volcanic activity! 🌋 Scientists have been puzzled for years about strange heat spots under its surface, but now they ...

Ganymede is the largest moon in the Solar System, with a diameter of 3,275 miles (5,270 km). Io has a lot of active volcanoes and is covered with sulfur. It is currently believed that we could ...

A 2022 satellite photo shows smoke rising from a caldera on Tofua, highlighting the "looming threat" of the volcanic island.

Over the last few decades, plenty of smaller irregular moons have been detected, often using the Canada-France-Hawaii Telescope atop Hawai‘i’s dormant Mauna Kea volcano. Saturn's moon Rhea ...

What’s next? Lava is erupting from several volcanoes, including one in Hawaii. Nearly 50 volcanic eruptions have been recorded this year, and more are expected. The Axial Seamount, an underwater ...

Astronomers have announced the discovery of 128 new moons orbiting Saturn, raising questions about why the planet has such a huge number of satellites. Investigating this phenomenon could provide ...

It is widely believed that Earth's atmosphere has been rich in oxygen for about 2.5 billion years due to a relatively rapid increase in microorganisms capable of performing photosynthesis.