CK12 Earth Science

(7) NASA.http://en.wikipedia.org/wiki/Image:Jupiter_from_Voyager_1.jpg. Public Domain. (8) NASA. http://en.wikipedia.org/wiki/Im ...

(24) NASA.http://en.wikipedia.org/wiki/Image: Titan_Earth_Comparison_at_29_km_per_px.png. Public Domain. (25) http://en.wikipedi ...

Chapter 26 Stars, Galaxies, and the Universe 26.1 Stars. Lesson Objectives Define constellation. Describe the flow of energy in ...

Figure 26.1: The constellation Orion is a familiar pattern of stars in the sky. ( 13 ) ...

The patterns in constellations and in groups or clusters of stars, called asterisms, stay the same night after night. However, i ...

light, heat, ultraviolet light, and radio waves. Scientists have built machines called accelerators that can propel subatomic pa ...

Table 26.1: (continued) Class Color Temperature range Sample Star F Yellowish-white 6,000–7,500 K Procyon A G Yellow 5,500–6,000 ...

Star formation starts when gravity starts to pull gas and dust in the nebula together. As the gas and dust falls together, it fo ...

Our Sun, which is a medium-sized star, has been a main sequence star for about 5 billion years. It will continue to shine withou ...

Figure 26.4: Supernova 1994D: When very large stars stop nuclear fusion, they explode as supernovas. A bright supernova, like th ...

Figure 26.5: After a supernova, the remaining core may end up as a neutron star. ( 20 ) If the core remaining after a supernova ...

the Sun, we can realize that the distance from the Earth to stars other than our own Sun is much greater than the distance from ...

Figure 26.6: Parallax is used to measure the distance to stars that are relatively nearby. ( 2 ) ...

The color of a star is determined by its surface temperature. Starsareclassifiedbycolorandtemperature. Themostcommonsystemusest ...

http://www-spof.gsfc.nasa.gov/stargaze/Sparalax. http://www.youtube.com/watch?v=VMnLVkV_ovc Vocabulary asterism A group or clu ...

26.2 Galaxies Lesson Objectives Distinguish between star systems and star clusters. Identify different types of galaxies. Descr ...

Figure 26.7: The bright star Sirius is actually a binary system with one large star (Sirius A) and one small star (Sirius B). Th ...

Star Clusters Star clusters are divided into two main types,open clustersandglobular clusters. Open clusters are groups of up to ...

Figure 26.9: M80 is a large globular cluster containing hundreds of thousands of stars. Note that the cluster is spherical and c ...

than even the most distant stars you can see. The closest major galaxy—the Andromeda Galaxy, shown inFigure26.10—looks like only ...