Document 0.97MB
This is the .pdf version of the presentation slides I use in my talk on the cosmic distance ladder. It is a description of the methods of...
Document 0.97MB
This is the .pdf version of the presentation slides I use in my talk on the cosmic distance ladder. It is a description of the methods of...
Document 2.78MB
These are presentation slides for a talk that I give on the life cycles of stars. How they are born, how they burn, and how they die.
I am having trouble showing that the baryon to photon ratio is η= nb/nγ ~ 2.7x10-8Ωbh2 where nb and nγ are the number density of baryons and photons respectively, Ωb is the baryon...
if a car traveling at constant speed goes 70 miles in 2 hours, how far will it go in 24 hours
In what order are the planets from the sun
I am stuck on this one question on my science homework, and I would like to know how to answer it so I can be ready for a quiz, too. Please help. Suppose a comet passes the sun every...
Stellar Evolution
and have examples of how the sun physically moves matter and how the sun chemically moves matter
I WANT TO SEE IT SO BAD
If the mass of the second object is very small compared with the first mass, then, to a good approximation, P2 = a3 / M1. Solving for the mass, we get M1 = a3 / p2 . Use this mass formula to...
I wanna ask about Astronomy! If Space is really elastic kind of, and the Gravitation pull of planets is due to the bend they cause because of their mass in Space, would it be true...
I am stuck on this question. Can you please help me.
If you look straight up and see the stars moving in circles centered directly overhead, what two places can you be on earth?
Unquestionably, one of the most entertaining ways to learn astronomy is simply to look up. While the summer nights are short and dusk does not happen until quite late, the relaxed pace of the summer and the locations where summer nights are generally clearer can make for some spectacular views. In the Northern Hemisphere, unfortunately, the winter sky is a bit more spectacular, but there are still... read more
( A) RIGEL'S SURFACE IS COOLER THAN BETELGEUSE'S SURFACE . ( B ) BETELGEUSE'S SURFACE IS COOLER THAN RIGEL'S SURFACE . ( C ) BETELGEUSE'S AND RIGEL 'S SURFACES ARE THE SAME TEMPERATURE . ( D ) THE...
(A) JUPITER WAS NOT ABLE TO COLLECT ANY HELIUM GAS . (B) MERCURY HAS THE MOST MASSIVE ATMOSPHERE OF ANY PLANET IN THE SOLAR SYSTEM ( C ) JUPITER'S GRAVITY ENABLED IT TO COLLECT A VERY MASSIVE GASEOUS...
(A) THERE ARE ABSOLUTELY NO ICES TO BE FOUND IN THE OUTER SOLAR SYSTEM .(B) ROCKY MATERIAL IS NOT FOUND IN THE INNER SOLAR SYSTEM ( C ) VOLATILE MATERIAL IS PERFECTLY EVENLY DISTRIBUTED THROUGHOUT...
TERRESTRIAL PLANET EMITS IS SIMPLY RETURNING TO SPACE HEAT ENERGY THAT THE PLANET RECEIVED BY ABSORBING LIGHT FROM THE SUN- ULTRA VIOLET , VISIBLE AND INFRARED (BUT PRINCIPALLY VISIBLE) . THE ENERGY...
POWER OF 3 K AND RADIUS 7.2*10 TO THE POWER OF 5 kM. WHAT IS THE RATIO OF THE PEAK WAVELENGTHS OF RADIATION EMITTED BY STAR S TO THE PEAK WAVELENGTH OF RADIATION EMITTED BY PLANET E? WHAT IS THE RATIO...
SUPPOSE THAT IN THE FUTURE ITS SURFACE TEMPERATURE DROPS TO 3*10 TO THE POWER OF 3 K, BUT ITS RADIUS INCREASES TO 7*10 TO THE POWER OF 9 m. DO YOU EXPECT THE COLOR OF THE SUN TO CHANGE , AND IF SO,...