HR

(redirected from Hertzsprung-Russell)
AcronymDefinition
HRHuman Resources
HRHour
HRHome Run (baseball)
HRHouse of Representatives
HRHorizontal Rule (HTML)
HRHeart Rate
HRHigh Rate (data taken at a rate of 50 observations per second)
HRHuman Relations
HRHit and Run
HRHuman Rights
HRCroatia (ISO 3166 Code)
HRHigh Resolution
HRHeavy Rain
HRHonor Roll
HRHood River (Oregon)
HRHighlands Ranch (city in Colorado)
HRHessischer Rundfunk (German Radio Station)
HRHistory Record
HRHereford (postcode, United Kingdom)
HRHalo: Reach (video game)
HRHome Rule
HRHouse Rule
HRHuman Remains
HRHomeroom
HRHomologous Recombination
HRHit Rate
HRHostRocket
HRHigh-Reflection
HRHertzsprung-Russell (Diagram)
HRHouse Right (technical theatre)
HRHypersensitive Response
HRHofrat (Austrian Public Authority Degree)
HRHeight/Range
HRHomestar Runner (humor website)
HRHot Rolling
HRHumanitarian Coordinator
HRHeavy Rescue
HRHoly Roller (band)
HRHuman Reliability
HRHiiraan (postal region, Somalia)
HRHolographic Repatterning
HRHot Rats
HRHedge Ratio
HRHidden Ridge (Trabuco Canyon, California)
HRHonorably Retired
HRHeavy Rigid (vehicle definition)
HRHeavy Repair
HRHinge Remnant (philately)
HRHold-Relax (PNF technique)
HRHydroxyethylrutoside (also seen as HER)
HRHeater Relay
HRHigh Rune (Diablo II game)
HRReceiver Height
HRHigh Repetitive
HRHiroko Nakamura (classical pianist)
HRHacienda Real
HRHelicopter Request
HRHospitalman Recruit (US Navy rating)
HRHomeroaster (coffee)
HRHover Race (game)
HRHeadquarters Regulation
HRHartmann-Rudolph (decoding algorithm)
HRHealthgate Resources Pty Ltd (Adelaide, SA, Australia)
HRRudder Hydraulics
HRHarold Ramis (actor/writer/director)
HRHeat Resisting
HRHeater
HRHand Receipt
HRHard Radiation
HRHead Race
HRHard Rock
HRHarm Reduction
HRHazard Ratio
HRHazardous Reagent
HRHead Resident (college dormitory)
HRHazard Report
HRHandwriting Recognition (technology)
HRHalf Rate (Speech Codec)
HRHard Reset
HRHampton Roads (Virginia)
References in periodicals archive ?
The name derives from their position on the famous Hertzsprung-Russell diagram, which classifies stars according to their brightness and temperature.
After such a star finally ages off the main sequence, completes its red-giant phase, and evolves onto the horizontal branch in the Hertzsprung-Russell diagram (shown at left), it spends a while pulsing rapidly before advancing to its final death throes.
The end product looked at the distances of each star and the spectral classes of the stars shown by colour through the Hertzsprung-Russell diagram.
It still is on the hydrogen-burning main sequence of the Hertzsprung-Russell diagram of stellar evolution.
In science, what is found on a Hertzsprung-Russell diagram?
En 1911 Ejnar Hertzsprung y Henry Norris Russell establecen la relacion entre la luminosidad y el color de las estrellas, y la expresan como una sucesion, conocida como Diagrama de Hertzsprung-Russell.
After a red giant has depleted all the helium in its core, it goes through various death throes, then sinks to the lower left in the Hertzsprung-Russell diagram, becoming a lifeless "white dwarf.
This proves the results, for example: the definition of the independent determination of the ultimate density of physical vacuum [3], the explanation of the nature of electron charge and finding its numerical value as well as numerical values of the constants of radiation [7, 9], the determination of the proton-electron mass ratio, the accounting of the forces of gravity in microcosm, the finding the neutron lifetime [8], the modeling the Hertzsprung-Russell diagram, the definition of model parameters of pulsars [6], the conclusion about the existence of two types of planetary systems [10], etc.
In 1927 the Danish astronomer Ejnar Hertzsprung (1873-1967; Figure 13), of Hertzsprung-Russell diagram fame, was examining plates in the archives at Harvard College Observatory.
The contraction towards dense cores, which must get rid of their increasing thermal energy through molecular line radiation, is treated, discussing also how development appears on a Hertzsprung-Russell diagram (in the case of low-mass stars)-e.
UK) present the proceedings of a November 2008 workshop bringing together researchers studying the morphologically separated, yet evolutionarily connected, stars in the upper blue and red sections of the Hertzsprung-Russell diagram, which have typically been studied separately in spite of their connections.
47 Types of what are represented on a Hertzsprung-Russell diagram?