Stars don't form out of nothing, but tracking the gas and dust that do eventually form stars is hard. They float around the ...

Absorption lines and the Doppler Effect To see the various colors that make up starlight, astronomers can use a prism to separate the colors.

The discovery of 13 diffuse interstellar bands with the longest wavelengths to date could someday solve a 90-year-old mystery. Astronomers have identified the new bands using data collected by the ...

This shows up when you look at the colors of the stars present within the galaxy, as well as the emission and absorption lines inherent to the galaxy itself: ...

Mysterious absorption lines could illuminate 90-year puzzle RIT professor co-authors Nature article and Gemini Observatory's 1,000th paper ...

Various physical mechanisms broaden the intrinsic absorption lines. The most important is that the random motions of the absorbing atoms cause “Doppler broadening.” Larger motions within the ...

Weymann and Wilcox1 have recently claimed that there is no evidence that the true occurrence of absorption lines in quasi-stellar objects (QSOs) is a function of red-shift. Such a conclusion, if ...

However, the optical absorption-line measurements allow us to derive a precise estimate for the line-of-sight reddening of E(B - V) = 0.020 ± 0.005 mag. Furthermore, our analysis of the absorption ...

Many of the absorption lines shown here are very close to one another, showing evidence of fine structure, which can split two degenerate energy levels into closely-spaced but distinct ones.

Hydrogen, a promising fuel, has extensive applications in many sectors. However, its safe and widespread use necessitates reliable sensing methods. While tunable diode laser absorption ...