Science Puzzle

6. The difference in the two solar calendars is caused by an astronomical phenomenon called?
8. Is a young blue white star and one of the most luminous of all stars, about 36,000 times that of the sun.
9. Is the imaginary line traced by the sun in the sky.
10. Of the earth's revolution around the sun, near stars seem to shift their positions against the farther stars and this is called.
12. They are seen by the observer at the southern mid-latitudes.
14. Astronomers defined the _____ as the standard unit of distance.
15. Are formed when a gas of cloud out in the nebula or other region of interstellar space collapses under the influence of gravity.
16. The star patterns that have been discovered but have not been officially identified as constellation are called?
17. According to Ian Ridpath's star tales _______ was a vain and boastful wife of King Cepheus of Ethiopia who lives next to her in the sky.
18. Means "circle of animals" in Greek.
23. They lie on either side of the celestial equator which is the projection of the earth's equator to the sky.
24. It is also known as the "Big Bear" and is one of the most famous constellations.
25. Of a star is described in terms of magnitude and luminosity. and luminosity.

1. They are seen by the observer at northern mid-latitudes.
2. Are constellations that move in a counterclockwise direction.
3. Are groups of bright stars which appear close to each other on the sky but are actually light years apart in space.
4. It is a constellation named after the Greek hero?
5. Are those with a mass of more than 10 times higher than that of our sun and a luminosity nearly 1,000,000 times as great.
7. Is a red star.
11. Is the measurement of the shift of a nearby object compared to distant objects when observed from two different positions.
13. Depends on it its size and temperature.
19. It is one of the most prominent star patterns in the sky.
20. Also describe the actual brightness of a star using the term absolute magnitude.
21. One myth claims that _____ is always visible in the Northern Hemisphere but not in the Southern Hemisphere.
22. Refers to an opaque object that emits thermal radiation.