What produces the 21-cm line that we use to map out the Milky Way Galaxy?
2006-07-18 15:54:13 · 6 answers · asked by hello there 1 in Science & Mathematics ➔ Astronomy & Space
21 centimeter radiation is radiation produced during a hyperfine transition of neutral hydrogen from the triplet to the singlet state.
2006-07-18 16:00:09 · answer #1 · answered by campbelp2002 7 · 0⤊ 0⤋
The flipping of the spin of a hydrogen atom's electron produces the 21cm line that we use to map the Galaxy. It occurs one every 11 million years for each atom. However because there's so much hydrogen out there, it's giving of 21 cm radio waves all the time.
2006-07-18 15:58:47 · answer #2 · answered by ozzie35au 3 · 0⤊ 0⤋
the most ample element interior the universe is hydrogen. The spiral palms of our galaxy are also ruled by skill of hydrogen. therefore it purely is sensible to benefit the 21-cm line with radiotelescopes, really considering optical 'scopes won't be able to reduce via the gases and airborne dirt and dirt for a superb illustration.
2016-12-10 11:41:22 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Hydrogen gas in space is energized by starlight, radiation, and magnetic fields and the result is that it radiates 21 centimeter long radio waves. By using a radiotelescope, we can see where the clouds of hydrogen are. This wavelength can penetrate dust and gas that light cannot.
2006-07-18 16:51:07 · answer #4 · answered by aichip_mark2 3 · 0⤊ 0⤋
Hydrogen
2006-07-18 15:58:20 · answer #5 · answered by Dr. Bugly 4 · 0⤊ 0⤋
Monatomic neutral hydrogen.
2006-07-18 17:04:47 · answer #6 · answered by David S 5 · 0⤊ 0⤋