This isotope is found at a ratio of about one per 2,500 helium-4 ions, the latter being the common version of helium.

A twisting, whirling streamer of plasma escaping the sun in the aftermath of a coronal mass ejection (CME) has been captured ...

Researchers have identified the origin of the highest-ever recorded concentration of a rare helium isotope (³He) emitted from ...

NASA astronaut Don Pettit -- NASA’s oldest active astronaut at 69 -- arrived at the station last week on his fourth trip to ...

Multiple spacecraft captured the moon's shadow sweeping across North America at more than 1,500 mph during the 2024 total ...

For the first time, a giant helical structure spanning millions of kilometers has been captured on camera as it emerged from the Sun. In 2020, the European Space Agency (ESA), with help from NASA, ...

With a deep partial solar eclipse already in progress, a crescent sun will appear on the eastern horizon. Thirteen U.S. states will see the March 29 solar eclipse in some form, with a deeper ...

This partial solar eclipse will be visible in remote areas of the southern hemisphere, including Antarctica and New Zealand, Space.com said. The point of greatest eclipse — where 80% of the sun will ...

No other imaging instrument can see—with a high enough resolution in both space and time—the sun's inner corona where this dance takes place. (Soon, however, the coronagraph of ESA's Proba-3 ...

Our planet's closest and brightest neighbor will pass approximately between the Earth and sun this week, in what's called an inferior conjunction.

Mar. 17, 2025 — The James Webb Space Telescope has captured its first direct images of carbon dioxide in a planet outside the solar system in HR 8799, a multiplanet ... Combination of Cosmic ...