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Astronomy Chapter 1. The scientific theory of the universe's earliest moments stating that all the matter in our observable universe came into being at a single moment in time as an extremely hot, dense mixture of subatomic particles and radiation -"The birth of the universe" -Produced two chemicals: Hydrogren and Helium -14 billion years ago.
The Solar Neighborhood is the stars within about 15 light years of the Sun. Most nearby stars are red dwarfs: cool M-type main sequence stars. The Sun is part of the Milky Way Galaxy, a system of more than 200 Billion stars, made up of a disk and central bulge.
Number of stars within 250 light years = 260 000. This map is a plot of the 1500 most luminous stars within 250 light years. All of these stars are much more luminous than the Sun and most of them can be seen with the naked eye.
A) It contains between 100 billion and 1 trillion stars. B) Our solar system is located very close to the center of the Milky Way Galaxy. C) Our view of distant objects is obscured by gas and dust when we look into the galactic plane. D) The galaxy is about 100,000 light-years in diameter.
For a good three dimensional representation of the solar neighborhood, see the Atlas of the Universe site - the solar neighborhood to 12.5 light years and to 250 light years. Distance Information We've already learned the closest star to ours is 39,900,000,000,000 km (4.22 light years ) away.
The star, whose mass is roughly half that of the Sun, is currently 62 light-years from the Solar System. It was first noticed in 1999 using data from the Hipparcos satellite, and was estimated to pass less than 1.3 light-years (0.40 pc) from the Sun in 1.4 million years.
The lifespan of a solar powered light depends on the battery. Outdoor solar lights can have either integrated batteries (meaning that they cannot be replaced) or replaceable batteries. If the solar light has an integrated battery then the light's life will end when the battery needs replacing. This lights tend to last about 2 years.
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The Solar Interstellar Neighborhood, Central Orion, Sol Sector, or simply known as the S.I.N is a sector of the Orion Arm of the Galaxy.It is one of the most prominent and populous areas of the Orion Arm and is known for being home the humans, one of the most intelligent species on the Earth.
The Local Interstellar Cloud (LIC), also known as the Local Fluff, is the interstellar cloud roughly 30 light-years (9.2 pc) across through which the Solar System is moving. It is unknown if the Sun is embedded in the Local Interstellar Cloud, or in the region where the Local Interstellar Cloud is interacting with the neighboring G-Cloud.