The next significant reports came into existence during World War I and there were also reports during World War II. ... We need to estimate the number of galaxies, the number of stars in an average galaxy, the number of stars that have planetary systems and the number of Earth like planets that are suitable for the formation of life. ... Most cosmologists believe that planetary formation around a star is quiet common. ... There are up to 50 billion planets like earth in our own Milky Way galaxy. ... This is another indication that life may be common in our galaxy. ...

• Word Count: 2961
• Approx Pages: 12

Such events will be more severe than the nuclear winter that became such an issue during the Cold War (The Threat 1-4). ... When a star has burned off about 10 to 20 percent of its hydrogen, its core will start to run out of fuel and begin the last stages of its life (The Fading 1). ... These elements will collect in the center of the star as the red giant sheds most of its envelope. As it sheds it will create a planetary nebula and then emerge as a hot white dwarf star (The Fate 1). Once a white dwarf star forms, its structural and thermal evolution is dominated by cooling down. ...

• Word Count: 2356
• Approx Pages: 9

Planets in Our Solar System From the beginning of time man has looked to the skies from intrigue and for answers and explanations. Many objects in space have observed, such as stars, constellations, galaxies, plants and moons. These celestial objects have been looked upon as spiritual and even ...

• Word Count: 2531
• Approx Pages: 10
• Has Bibliography
• Grade Level: High School