Unit 12 Studying Space Mr. Ross Brown Brooklyn School for Law and Technology

What are the general properties of stars? 2 May 2016 Do now: This question may require the use of the Earth Science Reference Tables. The length of an Earth day is determined by the time required for approximately oneEarth Science Reference Tables a)Earth rotation b)Earth revolution c)Sun rotation d)Sun revolution

In this unit we will learn about: Stars and Galaxies – Characteristics of Stars – Stellar Evolutions – Star Groups The Sun – The Structure of Our Sun – Solar Activity – Formation of Our Solar System

In this unit we will learn about: The Solar System – Models of the Solar System – The Inner, or Terrestrial, Planets – The Outer, or Jovian, Planets – Asteroids, Comets, and Meteoroids Moons and Rings – The Earth’s Moon – Movements of the Moon – The Lunar Cycle – Satellites and other Planets

What are the general properties of stars? Star: body of gases giving off tremendous amount of radiant energy as heat and light – Vary in color, size, mass, luminosity, temperature, distance from Earth, brightness,…….

What are the general properties of stars? Composition and Temperature – Color tells us which elements make up the star – Color also tells us temperature

What are the general properties of stars? Motion – Actual Motion vs. Apparent Motion – Apparent motion is due to the motion of _______ – Polaris, or North Star: located above the North Pole, Polaris does not appear to move the Earth

What are the general properties of stars? Actual motion of stars – They may rotate on an axis – They may revolve around another star – They move closer to or farther from the Earth Color changes as they move toward or away the Earth

What are the general properties of stars? As a star moves closer to Earth: blue shift because light waves appear to get shorter As a star moves further away, red shift because light waves appear to lengthen

Homework #26 2 May 2016 As you look up at the night sky, why do stars appear to move westward across the sky?

What are the general properties of stars?