Helium was first discovered on the sun before it was ever found on Earth. During a total solar eclipse in 1868, a French Astronomer, Pierre-Jules-Cesar Janssen, noticed a unique yellow line in the sun's wavelength spectr... More »

www.reference.com Science Chemistry Atoms & Molecules

Helium was originally discovered on the sun by a French astronomer named Pierre-Jules-Cesar Janssen. Janssen made his discovery when he observed a yellow line within the sun's spectrum in 1868 during a solar eclipse. More »

www.reference.com Science Chemistry Atoms & Molecules

A gas that has the opposite effect of helium on the human voice is xenon. Another gas that reverses the temporary high-pitched effect of inhaling helium is sulfur hexafluoride. Both gases are more dense than air and magn... More »

Argon is found in the Earth's atmosphere; it is also present in some potassium minerals due to the radioactive decay of isotope potassium-40. It is not found in compounds. More »

The sun holds the planets in their orbits, makes life possible on Earth and converts hydrogen into helium. The sun is a large ball of gas that is undergoing a thermonuclear reaction, which enables it to bathe the solar s... More »

Xenon is found in its natural form in the Earth's atmosphere, which contains about one part in 20 million of xenon gas. Xenon is a noble, or inert, gas that is odorless and colorless. More »

Archaeologists and scientists have dated ancient Egyptian iron objects to 3500 B.C. The Egyptian objects contained 8 percent nickel, suggesting that the iron came from a meteorite. The Hittites of Asia Minor began smelti... More »

www.reference.com Science Chemistry Atoms & Molecules