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Comets balls of ice rock and dust answer dirty

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Comets: balls of ice, rock and dust. (Answer: Dirty Snowball) Meteoroid/ Meteor/Meteorite: Meteoroid is the object itself. Meteor is the visible path as it enters the atmosphere. Meteorite is the surviving remnant on the surface of the earth. Which of the planets in our solar system don’t have any natural satellites (Orbiting Moons)? Venus and Mercury. Which of the planets in our solar system have rings? Jupiter, Saturn, Neptune, Uranus. The four largest planets in our solar system ( Jupiter, Saturn, Neptune, Uranus) have what type of surface? Gaseous . Stars: Birth: Nebula A cloud of dust and gas and the birth place of a star. First stage: in a stars life is called the Prostar Second Stage: Main sequence - fuses Hydrogen to Helium in core. Be carefull ! the answer is worded (fusion or fission) Note : If the gaseous body is too small for nuclear fusion to begin it's called a Brown Dwarf. Third Stage: After the Main sequence it can turn into a Red Giant or Super Giant. After ejecting Nebula it becomes a White Dwarf. White Dwarf is denser than the sun, but also less luminous. Super Giant Turns Supernova and becomes a Neutron Star or a Black Hole . Neutron stars are the remnants of a star that dies through particular types of supernova gravitational collapses. Black Hole (Nothing) can escape its crushing gravity. Thought to be at the center of the universe. 4
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ASTRONOMY DSST 05Mar2012 Pop I - Youngest, Pop II - Older, Pop III - Oldest Note: Younger the star the brighter it is & the higher metal content. O Type Star – Super Giant Blue Giant A star can only become a blue giant after exhausting its hydrogen in the main sequence. Red Dwarfs are the common lower-right on H-R map red stars. There are no such stars as green giants. Blue is the hottest not red Globular Clusters tend to stay together longer due to their stronger gravitational pull (big difference between them and open clusters). Question: Where are the Globular clusters located in our solar system? Since Open Clusters tend to be shorter-lived than globular clusters, the stars with them (open clusters) are also relatively young and younger stars tend toward greater luminosity and high temperature (which makes them blue), so open clusters have stars that are more luminous and towards the blue end of the spectrum in comparison with globular clusters. Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation. The radiation can only be observed when the beam of emission is pointing towards the Earth. This is called the lighthouse effect and gives rise to the pulsed nature that gives pulsars their name. Because neutron stars are very dense objects, the rotation period and thus the interval between observed pulses is very regular. The proton-proton chain is the process through which smaller stars, such as the sun, fuse hydrogen into helium. Stars more massive than the sun do this by the CNO cycle.
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