... cools down going into the phase of a red giant. The core continues to heat up getting to a point where nuclear fusion can resume. High-mass stars, those greater than 10 solar masses, require greater pressure, "So their cores must be hot enough to fuse heavier elements after hydrogen becomes helium and helium becomes carbon"" (e.g. Duncan and Tyler 2009). The star uses ... the core suffers sudden and catastrophic collapse, reaching the density of an atomic nucleus in a fraction of a second " (e.g. Begelman and Rees 1996). If the original star was more than thirty solar masses then the co...

• Word Count: 1007
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School

... , p. 129). In 1929, Edwin Hubble discovered that galaxies get redder, because they are moving away from or Milky Way Galaxy. Hubble's Constant is the term used to describe the distance scale of the universe (Smith, pp. 28-34). In May 1999 a Hubble project team finally decided on ... the correct Hubble's Constant after measuring distances between different galaxies. They arrived at a figure of seventy kilometer per second per megaparsec (http://hubble.stsci.edu/discoveries/10th/ ... our_universe/in-depth/science.shtml/). This is much less than Hubble's original determined constant (Smith,...

• Word Count: 1039
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School

... at his capacity to think) One of them is probably the most famous he ever invented. The special theory of relativity. This showed that neither time, weight, or mass is constant. When moving at high speeds time, weight, and mass get compressed. Einstein said it happens because energy is equal to mass times the speed of light square, it is usually ... curved around massive objects. This theory was very complicated and people didn't accept it. Einstein found a way for it to be proven it was to make observations of starlight during a solar eclipse. His theory was proven true in 1919; the sa...

• Word Count: 556
• Approx Pages: 2
• Grade Level: High School