Hubble's law explains that as the universe expands, galaxies are stretched further and further apart
But Hubble wasn’t done. His second major discovery also transformed astronomers’ understanding of the universe. As he dispersed the light fromdozens of galaxies into a spectrum, which recorded the amount of light at each wavelength, he noticed that the light was always shifted to longer or r...
intothebathroomtofindalltherolls 13 storedinthecupboard,intheshapeofalovelycastle. Shebeganinallseriousnessassheceremoniously 14 ahalfusedwhiterollontheholderwitha newpinkone,“ 15 Iuseit,Iwillremembertoprayforallthosepeoplewhoareintrouble rightnow.” ( )1.A.display B.television C.time D.purpose 30...
The twopeaks are respectively blue-shifted and red-shifted relative to the hostgalaxies and are separated by ~5000 km/s. The doubly-peaked profiles directlyreflect a bi-modal velocity distribution of the radioactive Ni56 in the ejectathat powers the emission of these SNe. Due to their random...
If the spectrum of a star is shifted to the blue end, then the star is moving toward us; if the spectrum is shifted to the red end, then the star is moving away from us. Likewise, if a star is spinning on its axis, the Doppler shift of its spectrum can be used to measure its...
The reason JWST was able to capture such ancient galaxies is that it is primarily an IR telescope: As the Universe expands, photons from distant objects get red-shifted until stars that originally shone in visible light can now only be seen in the IR. But these IR views are proving extreme...
In general, galaxies move away from each other as a result of the expansion of the universe (unless they are on a collision course). As a result, we see the light of distant galaxies shifted towards longer wavelengths due to the so-calledredshift(that is essentially theDoppler Effect, the...
Science Dictionary Just How Many Galaxies Are in the Universe? Space How is GPS used in spaceflight? Space 7 Facts About Arcturus, the Red Giant Star Space The Largest Star in the Universe Is 1,700x Bigger Than Our Sun Science Dictionary Cecilia Helena Payne-Gaposchkin Space The Great...
The twopeaks are respectively blue-shifted and red-shifted relative to the hostgalaxies and are separated by ~5000 km/s. The doubly-peaked profiles directlyreflect a bi-modal velocity distribution of the radioactive Ni56 in the ejectathat powers the emission of these SNe. Due to their random...
Are QSOs activated by interactions between galaxies? In a sample of 45 quasistellar objects (QSOs) with redshift 0.62 or less, a large fraction (more than 30 percent) appear to be currently interacting with a... JB Hutchings,B Campbell - 《Nature》 被引量: 75发表: 1983年 Adaptive Optic...