DSST Astronomy 2
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DSST Astronomy 2
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25 Questions

1. Caused by the TILT of the Earth. - Summer = Northern hemisphere tilted closer to sun Winter = Northern hemisphere tilted farther from sun.

2. Almost directly over the North Pole - and does not seem to move at all. If the star rises perpendicular to the horizon - the observer is standing on the equator

3. Imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator

4. Occurs when the Moon passes directly between the Sun and Earth and casts a shadow over part of Earth

5. The blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon

6. Galaxy with a bulge in the middle and arms that extend outward in a pinwheel pattern

7. How long does it take for Earth to orbit the sun?

8. A galaxy that does not fit into any other category;

9. Apparent motion of the planets when they appear to move backwards (westward) with respect to the stars from the direction that they move ordinarily.

10. Only one side

11. 23.56 hours

12. Galaxy with a very bright center that contains little dust and gas and is spherical to disklike in shape

13. Thick distribution of warm gas and stars around the galactic center.

14. The Milky way observed through a cross section - Our solar system is 27 -000 light years away from the Galactic bulge

15. Earth is the center of the universe. Aristotelian.

16. Alpha Centauri - 4.37 light years away OR Proxima Centauri - 4.24 light years away

17. Remnant radiation from the big bang - which we detect using radio telescopes

18. New moon - (waxing or waning) crescent moon - quarter moon - (waxing or waning) gibbous moon - and full moon

19. 29.5 days

20. 4.5 billion years

21. Twice-yearly point at which the Sun reaches its greatest distance north or south of the equator

22. Closet star to earth - and is a glowing ball of gas made up of 3/4 hydrogen and 1/4 helium - Produces heat by fusion - provides the gravitational pull that keeps our solar system together

23. A twice-monthly tide of minimal range that occurs when the Sun - Moon - and Earth are at right angles to each other - thus decreasing the total tidal force exerted on Earth causes North South pull

24. Moon phase that occurs when the Moon is between Earth and the Sun - at which point the Moon cannot be seen because its lighted half is facing the Sun and its dark side faces Earth

25. A cycle of rise and drop in the ocean; caused be the gravitational pull of the Earth - Sun - and Moon.

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