THE UNIVERSE

Jun 28th, 2015
Studypool Tutor
Price: $10 USD

Tutor description

GALAXIES- These may be spiral or elliptical in shape and contain 200 billion stars. The Milky Way galaxy is 2.25 million light years from the “nearby” Andromeda galaxy. About 24 galaxies form the local cluster, all moving around space together.

Word Count: 1355
Showing Page: 1/5
The universe as we know itGalaxiesThese may be spiral or elliptical in shape and contain 200 billion stars. The Milky Way galaxy is 2.25 million light years from the nearby Andromeda galaxy. About 24 galaxies form the local cluster, all moving around space together.QuasarsQuasars are distant powerful sources of light and radio waves putting out the energy of 100 galaxies. They have been identified as distant galaxies with an enormous central mass.StarsStars are huge spheres of hydrogen (H) and helium (He). Nuclear fusion occurs at 15 million degrees as hydrogen (H) nuclei slam together to form the helium (He) nuclei. (It is too hot for electrons to orbit the nucleus and form atoms)The sun has a mass of kg and is 1.4 million km in diameter. Yet, it is called a yellow dwarf. Blue giants can be 10 solar masses, while red dwarfs are only 0.1 solar masses. In size a red dwarf is less than half the suns size, while the biggest stars are supergiants of 300 solar masses and would extend out to Jupiters orbit, if placed at the centre of the solar system.Surface temperature determines a stars colour.ClassSurface Temperature (K)ColourO30,000BlueB10,000 to 30,000Blue/WhiteA10,000WhiteF6,000 to 10,000White/YellowG6,000YellowK4,500OrangeM3,000Red1. Blue giants are fusing furiously fast, so even though they may be up to 10 solar masses (Ms), they only live up to 3-10 million years, and then explode as supernovas (supernovae).

Review from student

Studypool Student
" The best tutor out there!!!! "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1820 tutors are online

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors