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Good afternoon! BELL Work (4 min.) Open up your notebook to page – 84 Get your book from the back and open it to page 268. Attach this page to page 84 in your notebook And start working on it. OBJECTIVES & LEARNING GOALS: ASTRONOMERS CAN: • Recall important information about Space Exploration in order to prepare for our End of Course Exam (May 18-20). Such as The SUN The center of Our Solar System The Earth is part of our Solar system which is on an outer arm of the Milky Way galaxy that contains billions of stars. The Universe contains billions of galaxies that can be spiral, elliptical, or irregular. The sun is MUCH CLOSER to us compared to all other stars. Therefore it looks much brighter even though it’s not compared to other stars. The milky way has billions of stars that orbit around the galactic bulge center. The solar system has 8 planets and billions of other objects that orbit around the Sun. Where do we fit in?? p. 168 The Sun’s powerful gravity holds all This law explains the formation of the of the objects listed in their orbits. Solar system and orbital movement of objects around the Sun. Historical models eventually built up to this idea. The surface would be rocky on a terrestrial planet and gaseous on a gas giant planet with no real surface to actually land on Energy is transferred from the SUN’s core upwards by radiation. Then, convection transfers the energy to the surface. It can take over a million years for 1 cycle of this to occur!!! 1. The moons phases are caused by the alignment of the Earth, Sun, and Moon which changes daily as the moon revolves around the Earth. Lunar eclipses occur when Earth’s shadow is cast on the moon. 3. During June Solstice, Earth tilts toward Sun giving the Northern hemisphere more direct sunlight and warmer temps while Southern Hemisphere has opposite. During December Solstice, Earth tilts away from Sun having the opposite effect. 2. Even though the Sun is much larger with stronger gravity the moon is MUCH 4. It takes the moon the same amount CLOSER to Earth causing it to have a of time to rotate as it does to make one greater effect on tides. full revolution around the Earth. 1. Remote-sensing satellites produce useful pictures of Earth. The Hubble Space telescope produces incredible images that have taught us more than we ever could have imagined about the Universe. 2. Rockets launch faster from our altitude and the Ocean makes it easy to retrieve booster rockets and fuel tanks. 3. Understanding this technology can help us develop better products here on Earth such as electronics systems, better thermal insulation, and others. OUT – PARTNER SHARE How confident do you feel about Unit 3 after today’s Review? Use the number scale below. 5 4 3 2 1 I remember this information very well. I remember most of this information and only need to review a little. I remember a little over half of the information. I do need to review some of what I missed. I remember very little of this. I got a few questions right but I mostly guessed. I really need to go back and study. I don’t remember any of this information. I missed almost all of the questions I answered today and I really need to review this information.