Astronomy & Space - April 2007

How does knowing the period of variability of a Cepheid Variable star allow us to determine its absolute magnitude?

Also

How could one use the apparanet magnitude of a star to correctly determine the Period-Luminosity relation?

I have been struggling with this....please help!

2007-04-16 06:47:36 · 5 answers · asked by Anonymous

Just askin

2007-04-16 06:46:49 · 14 answers · asked by Miss Jay 1

2007-04-16 06:42:50 · 3 answers · asked by briflynn44 1

I need to do a simulation of the motion of a satellite orbitting the earth so please give me an actually velocity and orbit radius of a real satellite and I can do conversion and simulation from there.

2007-04-16 06:31:42 · 4 answers · asked by The One Truth 4

2007-04-16 06:18:17 · 7 answers · asked by jam 2

tell me range in magnitude.

2007-04-16 06:17:14 · 5 answers · asked by નિકુંજ 1

zodiac sign: aries
dob:27 march 1987
time:3.25 AM

2007-04-16 05:47:37 · 6 answers · asked by Anonymous

In terms of catastrophic events, or total energy of collisions

2007-04-16 05:37:19 · 5 answers · asked by Alexander 6

Pleace i need the references ....

2007-04-16 05:22:34 · 5 answers · asked by jeje_candy1991 1

2007-04-16 05:15:30 · 15 answers · asked by Jen T 2

In the South East of England, there is a very bright light in the sky at night at the moment. I am not sure what way it is facing, but I don't think it is the North Star. It is stationary and is there night after night and is quite big to the naked eye, considering the size of nearby stars.

Any help would be greatly appreciated!

Thanks, Emma

2007-04-16 05:00:12 · 18 answers · asked by shnixangel 1

2007-04-16 04:57:33 · 5 answers · asked by This is my username 3

Your task is to find out about the 3 ways a star can end (do not spend time researching supernovae)

you must the produce resources (diagrams, models, summaries of important points, worksheets etc) which will help you to teach others in your group about stellar death.

You will need to include explanations of the following ideas and terms
- white dwarf
- neutron star
- black hole
- what these different objects will become/do

you will need to use ideas about energy and force in your explanations.


I looks at this sheet and i think i know a bit but im not sure on any of it, anything useful like links to website explanations of answers would be lovely and thank you in advance for your help.

2007-04-16 04:33:51 · 5 answers · asked by Jezza 2

2007-04-16 04:23:03 · 10 answers · asked by raghustein 1

I hear about a global EYE-SPY that is used on one (or many) of the sattelites that orbit our planet. - (Maybe it is in use by NASA or some "International survelience org.")
I hope to get a "Bird's-eye view" of many places around our globe - ("s-h-h-h-h-h!" without having to travel there) and my own back yard (just because I can.) :-')
What is that website address? and I hope it is free!
Thanks.
P.S. I already have my GPS coordinants to my yard.

2007-04-16 04:13:10 · 4 answers · asked by Anonymous

I know on light gathering of course, the refelctor wins.

but what benifits does a Maksutov-Cassegrain have over a basic reflector,other then price. is there that much of a diffrence between them in planet views and messier objects. and so on? If you had a choice between a 4.5 reflector with autostar 494. and or a Maksutov-Cassegrain 90mm 3.5 with a autostar 497. both have what is said 325x max power... on that what one would have the better VIEW?

2007-04-16 04:11:28 · 8 answers · asked by bugsy292004 1

2007-04-16 03:52:10 · 12 answers · asked by VAIBHAV J 1

2007-04-16 03:49:32 · 4 answers · asked by VAIBHAV J 1

IM FREAKING OUT!! SHOULD I BE???

2007-04-16 03:39:53 · 19 answers · asked by amandabridges2006 1

If the sun temperature has increased my .05 degrees.Then do you all think we are the cause of the increase in the sun temperature?Cos i think thats just evolution

2007-04-16 03:31:16 · 9 answers · asked by KAY 1

Does anyone know the name of any books of which I could get with just pictures of space in????

2007-04-16 02:46:44 · 3 answers · asked by MEHNAZ B 2

2007-04-16 02:36:10 · 9 answers · asked by Cindy 3

How do they do it & how can a citizen get involved?

2007-04-16 02:34:46 · 9 answers · asked by Cindy 3

it turned out to be a known celestial object. What was that object and why were they tricked?

2007-04-16 02:33:30 · 2 answers · asked by Cindy 3

2007-04-16 02:13:56 · 10 answers · asked by pouria t 1

2007-04-16 01:55:13 · 13 answers · asked by JLT 2

Like facing sun on earth, it is bright all around. what about when we go to space and we are exposed to sun? Is that brighter and hotter than being on earth?

2007-04-16 01:50:56 · 6 answers · asked by salman 1

and which ones have water?

2007-04-16 01:37:24 · 16 answers · asked by Anthony 2

I have heard that if you had two twins, seperated them and put one on mars for 5 years and one on earth for 5 years then brought them together one would be obviously older than the other, is this true? If it is true what about different altitudes, for example if one twin stayed on top of everest and the other at sea level for 5 years would they age differently

2007-04-16 01:25:27 · 11 answers · asked by Sylar 3

If the universe is expanding at a very fast rate what would happen if you managed to overtake the rate of expanding where would u be ? There must be something outside the universe because its expanding. Expanding into what? Oh an if you got out of the universe buy over taking the speed of expansion what might happen to you eg theres no time


answers or ideas plz



W8 1 more if the the universe does expand for ever like some scientist believe then does that mean that there is a infinite chance of other inteligent life (ALIENS!!!!!) being born in the galaxy.

2007-04-16 00:25:25 · 12 answers · asked by Hazza 3