Astronomy 1010 final test - Study guides, Class notes & Summaries

Astronomy 1010 Final TEST QUESTIONS WITH 100% COMPLETE SOLUTIONS Which two energy sources can help a star maintain its internal thermal pressure? - ANSWERS Nuclear fusion and gravitational contraction What is the source of luminosity for protostars that have not yet become hot enough for fusion in their cores? - ANSWERS Gravitational energy released by infalling matter What can we learn about a star from its life track on an H-R diagram? - ANSWERS What surface temperature...

Astronomy 1010 Final HW Test Questions With All Correct Answers One of the most important earlier steps in understanding stars was to group them into classes called spectral types that could offer clues as to why they are different from one another. Shown here are spectra of some main-sequence stars. Before stars were very well understood, they were classified into an order that was based on the relative strength of hydrogen absorption lines, marked by arrows the image shown. Look at the ...

Chapter_03_Moon_Phases_and_Eclipses 1 T​he Moon moves slowly against the background of the constellations. True False 2 A​ny location on the Moon is sunlit for three weeks and is in darkness for one week as the Moon rotates. True False 3 I​n most months, there are no eclipses. True False 4 A​s the illuminated part of the Moon grows larger from new to full, it is said to "wane". True False 5 O​ur calendar divides the year into 30­day periods in recognition...