Astronomers have now observed the radio emission from the neutral hydrogen gas (HI) in a nearby galaxy. Hydrogen gas emits radio emission in a spectral line at a very specific frequency of 1420 MHz.

I'm writing up a report about 21cm-line radio astronomy, and it includes a discussion of spectral lines and the 21cm line in particular.However, I have a problem that I was hoping the genius of ...

In 1941, German physicist Rudolph Minkowski proposed a two-level scheme based on the absence (type I) or presence (type II) of strong hydrogen spectral lines when the supernova is at peak brightness.

For the first time, scientists have measured two spectral lines for anti-hydrogen. Jeffrey Hangst, spokesperson for the ALPHA experiment says, ‘we are now entering a new era as we extend ...

But the great gravity and density on white dwarfs produce intense pressure that forces some of the hydrogen atoms to join. From the strength of the spectral lines, the astronomers estimate there is ...

What makes it so strange are its spectra, which showed a large spike in Lyman-alpha, or the hydrogen emission line. While stars are made of hydrogen – so this might not seem too weird – this ...

WHILE making experiments on the apparent production of neon and helium during electric discharges, I have noticed an effect which may be of interest to spectroscopists. A powerful oscillatory ...

Alluxa introduces two Hydrogen Alpha (H-Alpha) Emission Line Filters that are revolutionizing the ultra-narrow optical filters market. Though these new filters have been specifically tailored to ...

Guntur, spectral lines, ... behind only hydrogen. Despite this, helium is rather rare on Earth, only given off as a product when heavier elements undergo radioactive decay.