By : Besas , Jemarie D . Espuerta . Ma.Frechilyn Joy C. September 3, 2012 . STARS. WHAT IS A STAR?. A huge ball of ionized gas
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By: Besas, Jemarie D.
Espuerta. Ma.Frechilyn Joy C.
September 3, 2012
Wien’s Law : “The hotter the star is, the shorter the wavelengths it emits.”
Thus, HOT STARS will appear BLUE and WHITE while COOL STARS will be RED.
B. LUMINOSITY found in about the same place.
- the amount of energy a body radiates each second.
Inverse Square Law for Luminosity:
“ As light spreads out from a source, it spreads over progressively larger areas as the distance from the source increases.”
C. RADIUS found in about the same place.
Stefan Boltzmann Law: “ The luminosity of an object depends on its temperature.”
Thus, an increasing temperature or radius of a star makes it more luminous.
D. COMPOSITION found in about the same place.
“ The spectrum of a star is the amount of energy it emits at each wavelength. As light moves from its core to its surface layers, atoms absorb the radiation at some wavelength, creating dark absorption line that tells the composition of the stars.”
E. SPECTRAL CLASS found in about the same place.
O, B, A, F, G, K, M,
where O is the hottest and Mis the coolest
amount of interstellar gas, the larger is the star. Yet, the bigger the star, the shorter is its life span.
dense star, a but eventually compresses the helium in the core to start another nuclear fusion, turning it into a white dwarf.
carbon, neon, silicon and eventually iron. Since the iron core cannot burn and will collapse, it triggers a supernova explosion. shrinks again, turning it into a red giant once more. The outer layer is then driven off a planetary nebula shell. The core
The core produces a core cannot burn and will collapse, it triggers a supernova explosion. shrinks again, turning it into a neutronstar, or in the case of a super giant which continues to collapse, a BLACK HOLE
THANK YOU core cannot burn and will collapse, it triggers a supernova explosion. shrinks again, turning it into a