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

Above sunspots, active regions in the sun's atmosphere produce solar flares and coronal mass ejections (CMEs), both of which can influence Earth via space weather. However, the frequency of ...

At maximum the sun will be a bit under five degrees high in the east. The eclipse ends in Iqaluit at 7:47 a.m. Breaking space news, the latest updates on rocket launches, skywatching events and more!

NASA's Parker Solar Probe has successfully completed its second close flyby of the sun, the space agency announced earlier this week. The car-sized spacecraft swooped within 3.8 million miles (6.1 ...