402 Answered Questions for the topic astronomy

Astronomy

04/17/17

What is the minimum size of a quasar that shows variations in brightness over a period of 36 hours?
Express your answer in kilometers.
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Astronomy Physics

04/14/17

What Is Singularity ?
How did it come to mind that, it is in blackhole ?  What about its properties?  
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Astronomy

03/23/17

What is the Doppler effect? Give some familiar examples of the Doppler effect, and then specifically address the question of what property of stars can we learn
What is the Doppler effect? Give some familiar examples of the Doppler effect, and then specifically address the question of what property of stars can we learn about from the Doppler effect and... more
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Astronomy Science

03/23/17

Why does a shooting star light up in the sky?
A. Because nuclear fusion occurs inside the meteor’s trail B. Because the air surrounding the meteor bursts into flames C. Because the air molecules combine with the molecules of the meteor D.... more
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Astronomy Science

03/23/17

Why does a shooting star light up in the sky?
A.Because nuclear fusion occurs inside the meteor’s trail  B.Because the air surrounding the meteor bursts into flames  C.Because the air molecules combine with the molecules of the meteor ... more
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Astronomy Science Space Meteors

03/23/17

Why are meteorites so valuble cosmic samples
A. Because they represent some of the youngest material in our Solar System B. Because they can tell us more about the other planets in our Solar System C. Because they represent material from... more
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Astronomy

03/10/17

a procedure done under controlled conditions to test a hypothesis is an inquiry
a procedure done under controlled conditions to test a hypothesis is an inquiry
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Astronomy

12/02/16

The mass of man is 90kg; if he lost 25kg, how would his inertia change?
A. His Inertia would not change B. His Inertia would increase C. His Inertia would decrease D. It is Unknown how his inertia would change 
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Astronomy Astrophysics

11/30/16

I am having trouble with this astronomy question
According to the present estimates, the Universe is about ______ years old.     A.14 × 107 B.14 × 109 C.14 × 105 D.14 × 1011
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Astronomy

11/15/16

if a giant star 100 times the diameter of the sun, is 1 parsec from earth, what would its angular diameter be?
If a giant star 100 times the diameter of the sun, is 1 parsec from earth, what would its angular diameter be?  
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Astronomy Algebra 2

09/13/16

In a vacuum,the wavelength of light from a laser is 630 nm. What is the frequency of the light!?
I just really need help in astronomy
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09/13/16

Astrophysics question
Object A emits most strongly at 400 nm, while object B emits most strongly at 800 nm. What can we say about their relative temperatures? A’s temperature is the same as B’s.Nothing. Temperature is... more
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Astronomy Physics Astrophysics

09/12/16

I have a physics/astronomy question
What’s a black hole? What’s the difference between a reflecting and refracting telescope?
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Astronomy Physics

09/12/16

Blackk hole questtion
What’s a black hole? What’s the difference between a reflecting and refracting telescope?
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Astronomy

09/05/16

At local noon the sun is 4 degrees west of a certain star, the next day at local noon what will be the position of the sun relative to the same star?
The possible answers are: in front of the star 4 degrees east of the star 4 degrees west of the star 3 degrees west of the star 3 degrees east of the star
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08/23/16

Vijay the plumber put in an new bathroom for us. he charges 2200 pounds plus 17 and a half percent VAT. what was the total we paid?
I need to know how much we all paid and how much is 17 and 1/2 percent VAT. Is it add or times or is  all of the formulas.
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Astronomy

06/15/16

weins law help
According to Wien's Law, how many times hotter is an object whose blackbody emission spectrum peaks in the blue, at a wave length of 450 nm, than a object whose spectrum peaks in the red, at 700... more
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Astronomy

03/29/16

astronomy -please
?-The questions in this homework quiz all refer to the following graph: http://www.up-00.com/VERzSCdj   It shows a black body spectrum for an imaginary star. (In reality, while real stars do... more
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Astronomy

03/25/16

astronomy- please need help
A formula from physics is λmax × T = 0.0029. This formula is called Wien's law, and it relates the wavelength of the peak of a blackbody spectrum (your answer to question 1), to the temperature of... more
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12/06/15

relationship between number of objects in a given area and how often those objects intersect another object in that area
I am trying to calculate the number of asteroids in our solar system based on how often they hit the earth. I feel like there must be a mathematical relationship between how many objects there are... more
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12/05/15

Hubble Telescope question
The Hubble Space Telescope is a reflecting telescope in orbit about the earth so that its resolution would not be limited by turbulence in the atmosphere. Its objective diameter is 2.4 m. For... more
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Astronomy Physics Maths Math Help

10/26/15

Baryon to photon ratio urgent help
I am having trouble showing that the baryon to photon ratio isη= nb/nγ ~ 2.7x10-8Ωbh2where nb and nγ are the number density of baryons and photons respectively, Ωb is the baryon density parameter... more
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Astronomy Algebra 1

10/19/15

if a car traveling at constant speed goes 70 miles in 2 hours, how far will it go in 24 hours
if a car traveling at constant speed goes 70 miles in 2 hours, how far will it go in 24 hours
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Astronomy

07/07/15

How many planets in our solar system
In what order are the planets from the sun
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Astronomy Science

04/14/15

Astronomy question about comets
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 57 years,... more
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