Guntur, spectral lines, and the discovery of helium Did you know that helium is the first alien element, so as to say? This means that its existence elsewhere was discerned much before it was ...

How Scientists Discovered Helium, the First Alien Element, 150 Years Ago ... Italian physicist Luigi Palmieri recorded the yellow spectral line in his data while analyzing lava from Mount Vesuvius.

Helium may be the second most abundant element in the Universe, ... It wasn't until 1882, where that same unique spectral line was seen in the lava flowing from an eruption of Mount Vesuvius.

IN a letter to NATURE of February 11, Prof. J. W. Nicholson discusses the recent interesting experiments of Mr. Evans on the spectrum emitted from a vacuum tube containing highly purified helium ...

A research team from the Shanghai Astronomical Observatory (SHAO) of the Chinese Academy of Sciences has detected radio recombination lines (RRLs) of ions heavier than helium for the first time ...

A research team from the Shanghai Astronomical Observatory (SHAO) of the Chinese Academy of Sciences has detected radio recombination lines (RRLs) of ions heavier than helium for the first time ...

So their spectra are likely to contain absorption lines rather than emissions lines. By contrast, an early galaxy is likely to contain both cool helium gas and hot helium inside stars and so should ...

Since helium does not produce any observable spectral lines from the visible surface, or the photosphere of the sun, its abundance has usually been estimated through indirect means,” the ...

By the mid-1800s, researchers found that light from heated gaseous elements in laboratories produced opposite spectral patterns—mostly empty regions separated by bright lines of color.