In 1925, grad student Cecilia Payne first proposed that stars were mostly made of hydrogen and helium and shaped our ...

HD 49798 is a bright blue star in the southern sky, a subdwarf of O spectral type (sdO), located ... was found to showcase prominent helium and nitrogen lines, while the star also experienced ...

Lockyer shares the honour of discovering helium with Frenchman Pierre Janssen, who independently spotted the rogue spectral line in 1868. The pair coincidentally filed their paperwork on the same ...

An international team of astronomers has conducted multiwavelength observations of a variable star designated Gaia22ayj.

Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser ... When light from this spectral line is incident on the emitter, the stopping (cut-off) potential of photoelectrons ...

Spectral fingerprints of hot atomic helium, cold molecular hydrogen ... This second spectrum lacks a spectral line of cold molecular hydrogen. On the right is the comparison of the top and bottom ...

New ground- and space-based infrared observations are giving astronomers a better handle on the true populations of red ...

Due to their high gravity, they are known to have atmospheres of either pure hydrogen or pure helium. However ... turned out to be a hot subdwarf of spectral type O(He). It has a radius of ...

You’ve gotta B kidding. Seven subway lines had on-time averages of only 75% or less this year — with the B line’s trains unreliable of the bunch, according to MTA data. B-line trains had a ...