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The Milky Way Prezi
Transcript of The Milky Way Prezi
•There are approximately 100 to 400 billion stars in the Milky Way.
•Scientists have deduced that its mass is 3.6 million solar masses that are within a region smaller than 45 AU (astronomical units).
•The Milky Way is a grand spiral galaxy.
•It is about 100,000 light years in diameter and a few thousand light years thick. What is the Milky Way Galaxy near? Our Galaxy is near Canis Major Dwarf The Canis Major Dwarf is the closest galaxy to the Milky Way. It is approximately 25,000 light years away. This is the way to the Milky Way... How many habitable planets are in the Milky Way? Astronomers estimate that there are 100 billion habitable Earth-like planets in the Milky Way. Astronomers figured this out by comparing the mass of Earth to other planets, and then observing whether they are rocky. How do photographers take images of the Milky Way? Photographers take photos of the Milky Way by slowing down their shutter speed and adjusting other settings on their camera. It will take them more than one try to get a "perfect picture." Photographers can produce wonderful photos of nebulae, which are clouds of gas and dust. They use special filters that capture different lines produced by a glowing nebula. Many people think that the Milky Way Galaxy is a full circle, however, it is only a semi-circle. •In the core of the Milky Way, there is a massive black hole.
•Because of this black hole, the stars at the very center move at a very high speed.
•Yet, if you observe the rotation curve, it looks like the stars in the center are moving at a speed of zero. The Sun orbits the Milky Way Galaxy at a speed of 48,000 m/s. Even at that speed, the Sun has only orbited around the Milky Way 20 times. Our home is the Milky Way Galaxy. It has a nucleus and a center bulge with a bar-like structure. Each end of the bar has two major arms that branch into other arms. The four main arms are Norma, Sagittarius, Orion, and Perseus.