Question

Word 100 would Sepeda Alexis a /Doc assurdoc 78DEFABZSC 50E6-4918-9ASA-6FR2852BDA3C7 eda sudert.coses Office dension 102AST-68-online (3)_20200328_165945 - saved -102AST. Home Tenta yout Times Now Ro. References Review ViewHelp 12 AAB T Tell me what you want to do Y A Y A Editing Y12 Styles Find Dictate de Answer the following questions using the Astronomical Glossary on the back of the sky wp. 7. What is the difference between a binary star and an optical double? 8. What is the difference between a globular star cluster and an open stardust? 9. Fill in the table below using the Sky Calendar on the front of the sky map. After you have angular size in arcminutes, convert to angular size in arcseconds, remembering that acminutes 60 arcseconds For the Moon at Perigee Angular size (arcmin) For the Moon at Apec Angular size arcmin): Angular size arcsec) Angular size ( sec) 9 AM

Answer 1

7. Binary star and optical double: A binary star is a star system of two stars which are orbiting around a common barycenter. anoptical double is an illusion which occurs when two stars which in reality are far apart from each other by chance alignment from the Earth appear to be near to each othe.

8. Globular star cluster and open star cluster: Open star clusters are a relatively younger group of stars containing less than a few thousand stars

Globular star clusters are made of older stars, as old as the universe itself. comprising of 10,000 to millions of stars and usually spherical in shape.

9.

For the moon at Apogee	For the moon at Perigee
Angular size arcmin:29.538'	angularsize arcmin:33.288'
Angular size arcsec:1772.28"(=29.538*60)	Angular size arcsec:1997.28"(=33.288*60)
distance km:404510km	distance km:359,000km