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

Those looking up last night already saw a beautiful show as the near-full moon rose in clear skies. Tonight is slightly ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Firefly Aerospace's Blue Ghost lunar lander made the most of its last few hours of life on ...

EMMA: Blue and grey stuff. I think it's cloud. WOMAN 2: Josh, do you know, is there usually a star that's out in the day time? JOSHUA: The thing that looks like a star is the Sun. NARRATOR ...

The Sun is a star of medium size. It gives out heat and light and makes life possible on Earth. Galaxies are huge collections of billions of stars like our Sun. Our Sun belongs to a spiral galaxy ...