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 ...

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.

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.

Among the usual spectral lines, a yellow line blazed through, writes Mary Elvira Weeks in Discovery Of The Elements. The line was similar—but not quite identical—to that produced by sodium. In fact, ...

Fortunately, because helium atoms formed so rapidly, the photons they emitted are sharply concentrated at certain frequencies, known as spectral lines.

But surprisingly, with helium, both effects seemed to come into play. Stark appearances and unexpected states. When atoms are placed in electric fields, there is a shifting and splitting of their ...

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 ...

The tight spectral line showed that the hybrid atoms in superfluid helium aren’t experiencing atomic collisions in the billiard-ball manner that’s typical in a gas. The question was why.

Narrow spectral lines measured for antiprotonic helium in superfluid. High-precision measurements of exotic atoms containing antimatter are shown to be equally precise when the atoms are immersed ...

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 ...