IN 1896 Prof. E. C. Pickering discovered a series of lines in the spectrum of the star ζ Puppis which has been attributed to hydrogen in consequence of numerical relationship to the Balmer series ...

A research team from the Innovation Academy for Precision Measurement Science and Technology (APM) of the Chinese Academy of ...

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.

Azrael A. von Procházka, Anthony J. Remijan, Dana S. Balser, Robert S. I. Ryans, Adele H. Marshall, Fredric R. Schwab, Jan M. Hollis, Philip R. Jewell, Frank J ...

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 and ...

The Royal Society is a self-governing Fellowship of many of the world's most distinguished scientists drawn from all areas of science, engineering and medicine, and is the oldest scientific academy in ...

Antimatter is matter that we don’t encounter very much in everyday life. This form of matter is different to the stuff we see around us. In simple terms, antimatter is matter that carries an opposite ...

Supernovae are classified primarily based on their spectral characteristics, notably the presence or absence of hydrogen lines, leading to type I (no hydrogen) and type II (hydrogen present) ...

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 ...