(Dr. Barbara Mattson, 28-Dec-2010) A star cluster or star clouds are groups of stars. Star clusters can be distinguished as global clusters, which are roughly spherical groupings of from10, 000 to several million stars packed into regions of from 10 to 30 light years across. They commonly consist of very old Population II stars—just a few hundred million years younger than the universe itself—which are mostly yellow and red, with mass just less than two solar masses. Such stars predominate within clusters because hotter and more massive stars have exploded as supernovae, or evolved through planetary nebula phases to end as white dwarfs. Open clusters are very different from globular clusters.
Neon has an atomic number of 10, and a mass of 20.180. Neon has three stable isotopes: neon 20, 21, and 22. These three isotopes comprise 90.92 percent of natural neon, 0.26 percent of natural neon, and 8.82 percent of natural neon, respectively. There are five other isotopes of neon, and they are all
Rigil Kentaurus Rigel Kentaurus, also known as Alpha Centauri, is the third brightest star in the sky. Its name literally means foot of the centaur. Arcturus Arcturus is the brightest star in the constellation Bootes, which is one of the oldest constellations in the night sky. It is the 4th-brightest star in the entire sky. Vega Vega is the fifth brightest star in the sky.
Life Cycle of a Star Pamela Hughes May 17, 2011 SCI/151 Norman Stradleigh Life Cycle of a Star On a clear dark night, one can see thousands of stars. We can see many stars but could never dream of being able to count them all. Even though each individual star is unique, all stars share much in common. The Sun, which is the source of virtually all light, heat, and energy reaching the Earth, is the nearest star. Today, we know that stars are born from interstellar gas clouds, shine by nuclear fusion and then die, sometimes in dramatic ways.
Red shift occurs when light radiation moves away from an observer. The red shift is seen due to the expansion of the universe and distant light sources (millions of light years away) show red shift corresponding to the rate of increase in their distance from earth. If the universe was very, very hot, as scientists seem to think it was, there must be some remnants of heat left over from the beginning of the universe. In 1965, radio astronomers Arno Panzias and Robert Wilson discovered a 2.725 degree Kelvin Cosmic
BETA PARTICLES Beta rays are much lighter energy particles. The beta particle is an energetic electron given off by the nucleus of unstable isotopes to restore an energy balance. They leave the nucleus at a speed of 270,000 kilometers per second. They can be stopped, for instance, by an aluminum sheet a few millimeters thick or by 3 meters of air. The RS-500 can detect most energetic beta particles through the case.
When LiCl is burned the color of the light is an intense red. When BaCl2 is burned the energy is released in packages of light which its color is yellow-green. When BaCl2 is burned the energy is released in packages of light which its color is yellow-green. Data Table 2: Data processing | Metallic Element | Hypothesis | Observation | Sodium ChlorideNaCl | I though that the light of the energy release was going to be red. Because the number of electrons in this compound is no too high in comparison of other compounds.
The first difference I would like to explain is the size and the mass of the two. The Jovian planets are much larger than the Terrestrial planets. In terms of both mass and radius, the Jovian planets are the true giants of the solar system (INTERIORS). These planets actually vary in size; none of them are even remotely the same. The smallest Jovian
Phobos will eventually crash into Mars or break up and form a ring around the planet. Deimos (which means fear) was named after the Greek God Deimos who was the twin brother of Phobos. Deimos is the outer moon so it is further away from Mars and takes about 30 hours to orbit. It is small and lumpy and has lots of craters and is covered in dust and loose rocks. Although it has many craters it’s surface is much smoother than Phobos’ Deimos has an average radius of 6.2
(Nix, 1998) This law is also related to the “inverse law” (I\r2: inverse radius), which states as the radius doubles the intensity of something (light) is quartered. i.e: if you had 2 identical candles burning at a distance of 10m and 20m respectively, you would notice that the further candle did not seem to burn as bright, having an intensity ¼ of the candle burning at 10m. It is this exact relationship that Leavitt’s was able to apply to her Period-luminosity laws. By knowing the period of a star is directly related to its absolute luminosity this law can be worked in reverse to establish distances from each other (Nix, 1998). Leavitt completed her research on period/luminosity by 1912 and astronomers such as Hubble, and Shapley have since used her work.