Question

Can someone help me answer this? No one's on the physics forum :/

Answer 1

Anyone..?

Answer 2

I'm out of practice with Astronomy, so if there are any experts on here, please feel free to clarify or correct me.

Right Ascension is the measurement of a star's angular distance from the spring equinox. This is similar to longitude lines on a map. Right Ascension is measured eastward, in hours. These hours correspond with hours of time, so the difference in Right Ascension will tell you the amount of time it will take one star to occupy the position another star was previously occupying.

For your question, I would say that A is the only answer that makes sense. Since Star 1 has an RA of 4 and Star 2 has an RA of 3, the difference between them can only be only one hour. Option A is the only one that puts the two stars an hour apart.

Answer 3

Funny 'cause this is 9th grade homework ;~;

Answer 4

I saw your question in the physics section, but I never studied astronomy. But, looking at the table, I think A is the clear answer based on the table structure alone.

Answer 5

The comparisons are all with each other, but I don't think the table's numbers are comparisons themselves. And so the only one that makes sense is the one that compares 3 hours and 4 hours.

Answer 6

^^ thnx all of you

Answer 7

Of course, I still don't know anything about astronomy! You're welcome!

Answer 8

Can you help me with a few more?

Answer 9

I won't be able to help with astronomy, sorry!

Answer 10

I mean, you could ask. Send me the link to it or use @theEric and I'll take a look. Hopefully others can help, though!

Answer 11

If you post any others, I'll see if I can help. I took college Astronomy, but it's been years.

Answer 12

>.> dw ty tho! It 9th grade ;~; I wish I had physics instead.. I'll still get a major in astronomy =.=

Answer 13

..One day >.>

Fairly simple and easy wanted to make sure though,

Answer 14

What'd you think?

Answer 15

http://www.spittal.me.uk/wiki/images/c/c1/Emspectrum.jpg

Answer 16

I think B .. not even remotely close to D >.<

Answer 17

I agree! :)

Answer 18

Infrared.

Answer 19

Infrared is correct. The only electromagnetic radiation with a shorter wavelength than radio waves but a longer wavelength than visible light is infrared radiation and microwaves. They don't have microwaves as an option, so it has to be infrared.

Answer 20

Yeah :)

Answer 21

:D

Answer 22

he ozone layer in Earth's atmosphere absorbs ultraviolet radiations. Which of these is the best location to place a telescope used to observe ultraviolet radiations from stars?

space

mountain

top of building

high-flying aircraft

I think its space because of all the reason why it would be much better. i.e humidity, pollution, dust and so on.

Answer 23

You're right. Space is the only option outside of the Earth's atmosphere, which absorbs the radiation.

Answer 24

:}

Answer 25

Which of these graphs would best model and predict the lifetime of the Sun on the main sequence?

http://learn.flvs.net/webdav/assessment_images/educator_ess_v11/ouruniverse/aou034.jpg

http://learn.flvs.net/webdav/assessment_images/educator_ess_v11/ouruniverse/aou035.jpg

http://learn.flvs.net/webdav/assessment_images/educator_ess_v11/ouruniverse/aou032.jpg


http://learn.flvs.net/webdav/assessment_images/educator_ess_v11/ouruniverse/aou033.jpg

Answer 26

I think D

Answer 27

Or A ! :S

Answer 28

I can't see the pictures. The link gives me an error.

Answer 29

C or D on this one, the format changed

Answer 30

I would say B. Only because time is on the y-axis and the mass is on the x-axis. D looks like what you would expect the answer to be, but with the axes switched it's illogical. We can also eliminate A for the same reason. That leaves B and C. We know that the mass of the sun is decreasing, so that leaves B.