On Friday, April 30, 2010, our science teacher, Mrs. DiPietro gave us a presentation about stars. She told us that stars differ in size, mass, color, temperature and brightness. The colors that stars have are blue, yellow, and red, and that their life cycle is as long as sun's, which is 9 billion years. If the star is blue, then it tells that the star is young a very hot, about 35,000 degrees Celcius. Blue stars can also die out sooner than other stars. If the star is yellow, then it is middle-age star. If the star is red, it is cold, around 3,000 degrees Celcius, and it is about to die.
Our teacher also explained us about the sizes of stars (see pictures at the left). First, she told us about Supergiant stars. Their size is 1000 times the diameter of the Sun. These star giants include Rigel, Betelgeuse, and Antares. Then our teacher told us about giant stars. They are 10 to 100 times as large as a sun, and these include Sirius, the brightest star in our sky. We learned that the stars come from Nebulae, and sometimes from EGGs (Evaporating Gaseous Globules)
We also learned Binary stars are stars that stay together because of gravity between them, and that there are 88 accepted constellations in our sky.
APOD 6 due Tuesday, May 4, 2010, at 08:00 a.m.
Next scribe is Aidan