Doppler Shift If a wave source is stationary, the wavefronts spread out?symmetrically If the wave source is moving, the waves can become?squashed?together or?stretched?out If the wave source is mov...
抓緊時間，下半年可以報名的國際學(xué)術(shù)活動不多了，疫情之下，各項規(guī)劃都變得非常謹慎，大家一定要注意時間節(jié)點。2023himcm學(xué)術(shù)活動報名時間將截止，你報名了嗎？你是如何備賽的？ 報名截止日期：2022年11月2日14:0...
The Life Cycle of Stars The life cycle of stars go in predictable stages The exact route a star's development takes depends on its initial mass Initial Stages for All Masses The first four stages i...
The Hertzsprung - Russell Diagram Danish astronomer Ejnar Hertzsprung, and American astronomer Henry Noris Russell, independently plotted the?luminosity?of different stars against their?temperature...
Determining distance using standard candles Standard Candles A standard candle is defined as: An astronomical object which has a known luminosity due to a characteristic quality possessed by that c...
Determining Distance using Parallax The?principle of parallax?is based on how the position of an?object?appears to change as the position of the?observer?changes For example, when?observing?the sca...
Inverse Square Law of Flux The moment the light leaves the surface of the star, it begins to spread out uniformly through a spherical shell Light sources which are further away appear fainter becau...
Wien's Law Wien’s displacement law relates the observed wavelength of light from an object to its surface temperature, it states: The black body radiation curve for different temperatures peaks at ...
Stefan-Boltzmann Law An objects?luminosity?depends on two factors: Its surface temperature Its surface area The relationship between these is known as the?Stefan-Boltzmann Law, which states:...
