earth science 25. Flashcards
are stars in contellations actually close to each other
no they just seem that way from our point of view.
how many constellations are there
88
what is important about the big and little dipper.
the big dipper points to polaris
what is polaris
it is directly in the north so if your lost you can just look for it
why does it look like the stars are moving around in the sky
earths rotation makes it look like that
how long does it take the sun to get to the other side of the earth
6 months
How much would we see stars that are near the equator
only sometimes
what are the stars called that we can see them all the time
circumpolar
what is the equivalent of lines of latitude on those globes
declination
how many times would we see stars in the south
never
why are their 24 numbers going around the globe
becuase it takes the earth 24 hours to rotate
what are the vertical lines on that globe
right ascensions
what are the differneces between stars that we can see
their size color and temperature,and elements that make them up.
name the color of stars from hot to hottest
red yellow then blue the hottest
what are binary stars
when two stars rotate around each other
what is the name of a triple star
proxima centuri
what does mass say about the wobble of binary stars
the more mass one has than the other star the more wobble it has, But if the stars are equal mass there is less wobble.
what is an eclipsing binary star
when one star is bright the other is relatively dim. When they are matched there is less light but when they are side by side there is more.
what is parallax
it is the apparent shift in position when you look at something one angle to another.
what do we do to notice a stars shift in positon
we wait half a year later because we moved by a lot
