Hydrogen-alpha, typically shortened to H-alpha or Hα, is a deep-red visible spectral line of the hydrogen atom with a wavelength of 656.28 nm in air and...

line is called "Lyman-alpha" (Ly-α), while the 7 → 3 line is called "Paschen-delta" (Pa-δ). There are emission lines from hydrogen that fall outside of...

A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively...

Lyman-alpha, typically denoted by Ly-α, is a spectral line of hydrogen (or, more generally, of any one-electron atom) in the Lyman series. It is emitted...

relative location of carbon atoms as well as hydrogen atoms to other functional groups. The α-carbon (alpha-carbon) refers to the first carbon atom that...

sequence of amino acids. The alpha helix has a right hand-helix conformation in which every backbone N−H group hydrogen bonds to the backbone C=O group...

with another using the PP chain. Fusing four free protons (hydrogen nuclei) into a single alpha particle (helium nucleus) releases around 0.7% of the fused...

22 June 2022. Davenport, Justin (14 October 2021). "China launches hydrogen-alpha solar telescope aboard Long March 2D". NASASpaceFlight. Retrieved 22...

spectroheliometer) S-055 (Ultraviolet spectrograph) Hydrogen alpha and coronograph: H-alpha no. 1 H-alpha no. 2 S-052 (a Coronagraph) Also, experiment S149...

which redirect 95% of the light and heat away from the eyepiece, up to hydrogen-alpha filter systems and even home built spectrohelioscopes. In contrast to...

A hydrogen vehicle is a vehicle that uses hydrogen to move it. Hydrogen vehicles include some road vehicles, rail vehicles, space rockets, forklifts,...

sign nebula". NGC 6888 in Hydrogen and Oxygen Light. HOO Palette. Imaged by Don Christopher Deaver Crescent Nebula in H-alpha and OIII. Imaged with a 715mm...

These lines are named for the elements which cause them, such as the hydrogen alpha, beta, and gamma lines. A glowing object will show bright spectral lines...

A hydrogen-like atom (or hydrogenic atom) is any atom or ion with a single valence electron. These atoms are isoelectronic with hydrogen. Examples of hydrogen-like...

sometimes called dihydrogen, but more commonly called hydrogen gas, molecular hydrogen or simply hydrogen. It is colorless, odorless, tasteless, non-toxic...

Buren with engineer Wayne Rosing mapped the entire southern sky in the hydrogen alpha transition with sufficient sensitivity for decontamination of the Milky...

In chemistry, a hydrogen bond (or H-bond) is primarily an electrostatic force of attraction between a hydrogen (H) atom which is covalently bonded to a...

hydrogen. It has a diameter of about 4.5′, at its distance meaning it measures 2.1 ly (0.65 pc). The net (meaning omitting the star) hydrogen alpha luminosity...

reflecting other colors Hydrogen-alpha filter, an optical filter that transmits a narrow bandwidth of light centred on the H-alpha wavelength Photographic...

neutral hydrogen atom. As the light travels through multiple gas clouds with different redshifts, multiple absorption lines are formed. The Lyman-alpha forest...

are stronger acids compared to their non-alpha hydroxy counterparts, a property enhanced by internal hydrogen bonding. AHAs serve a dual purpose; industrially...

spectral lines of hydrogen found outside the visible spectrum. The red H-alpha spectral line of the Balmer series of atomic hydrogen, which is the transition...

heightened hydrogen-alpha (H-alpha) sensitivity for improved capture of red hydrogen emission nebulae. The 60Da is three times as sensitive to H-alpha light...

H-Alpha Mapper (WHAM) is a custom-built 0.6 metres (24 in) telescope operated by the University of Wisconsin–Madison, used to study the Hydrogen-alpha ions...

Alpha Centauri (α Centauri, Alpha Cen, or α Cen) is a triple star system in the southern constellation of Centaurus. It consists of three stars: Rigil...

((CH3)3CO)2CrO2), which is itself a good oxidant. For those structures with hydrogen alpha to the oxygen, the chromate esters degrade, releasing the carbonyl product...

In this near true color photograph, taken through a narrowband hydrogen-alpha filter, plages are visible as overexposed patches....

southern portion is red from hydrogen alpha emissions, and the center region is colored yellow from both oxygen and hydrogen emissions. The western white...

be pre-main-sequence stars, with 26 candidates identified based upon hydrogen alpha emission and the presence of lithium in the spectrum. The stars in the...

Head Nebula in Narrowband Sulfur-Hydrogen Alpha- Oxygen with a 1000mm telescope Monkey Head Nebula in hydrogen alpha focal length 384mm Monkey Head Nebula...