Using the X-shooter instrument at ESO's Very Large Telescope (VLT), German astronomers have detected three new pre-white ...

For example, the Ar for helium is 4.0, and the A r for carbon is 12.0. This means that carbon atoms have three times the mass of helium atoms. To calculate the M r for a substance: work out how ...

For example, a helium atom has an atomic mass of 4, but an atomic number (or positive charge) of 2. Since electrons have almost no mass, it seemed that something besides the protons in the nucleus ...

When helium filled balloons are handed out at public ... So rule number one, don't let go of your balloons! In organised 'mass balloon releases' however, the standard practice is to tie a knot ...

Berkeley Lab geochemist B. Mack Kennedy used this mass spectrometer (foreground) to determine helium isotope ratios in samples of surface fluids from the northern Basin and Range. Disclaimer ...

01 times that of our own sun, but their mass is about the same. Stars like our sun fuse hydrogen in their cores into helium. White dwarfs are stars that have burned up all of the hydrogen they ...