Bell Ringer 1 – Take out your notebook

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Presentation transcript:

Bell Ringer 1 – Take out your notebook 2 – Take out a new sheet of paper, put your name on it, and title it “Bell Ringers” 3 – Complete Bell Ringer Slip

Structure of the Universe (Pg 29)

Essential Question: *What makes up the Universe?

Part 1 - What is the Universe? Universe - Space and all of the matter (stuff) and energy that is in it.

What is the Universe? *Includes galaxies, stars, solar systems, planets, other objects (moons, comets, asteroids, meteoroids), dust, gases

UNIVERSE GALAXY STAR SOLAR SYSTEM PLANET

*Galaxy – a massive system of stars, gases, dust, and other matter held together by a central gravitational force

*There are billions of galaxies in the Universe *Each galaxy contains billions of stars

A) Spiral Galaxy – Circular with spiral arms *The Milky Way Galaxy is spiral

B) Elliptical Galaxy – oval-shaped

C) Irregular Galaxy – no regular shape (blotch) http://viewpure.com/RubnGwhcT6E?start=0&end=0

*Stars – large spherical (round) bodies composed of gases and gives off light The Sun Sirius Polaris Betelgeuse Aldebaran

*Solar System – a central star with planets and other small objects orbiting it

*Planet – a spherical body that orbits a star

Gases and Dust (Nebula) Other types of Matter: Gases and Dust (Nebula) http://viewpure.com/-PQpNb_yJVE?start=0&end=0

In your own words, describe the Universe Conclusion Quick Write: In your own words, describe the Universe

Part 2 - Measuring Distances in the Universe

*Astronomical Unit (AU’s) – the distance from Earth to the Sun --used to measure distances in the Solar System

*AU = 150 million kilometers (km) or 93 million miles

*Light year – the distance light travels through space in 1 year of time --approximately 6 trillion miles per year (6,000,000,000,000) --670 million miles per hour --386,000 miles per second ***Nothing travels faster than light*** -- 1 Light year = 63,200 AUs

**Over 5 million years traveling at jet airliner speed (550 mph) *Light year **Used to measure distances in the rest of the Universe *It would take 4.3 years to travel (at the speed of light) to the nearest star (Alpha Centauri) from Earth **Over 5 million years traveling at jet airliner speed (550 mph)

Sirius 8.6 ly Vega 25 ly Aldebaran 65 ly Betelgeuse 430 ly Rigel STAR DISTANCE Sirius 8.6 ly Vega 25 ly Aldebaran 65 ly Betelgeuse 430 ly Rigel 773 ly https://www.youtube.com/watch?v=CiDkNvaOtB4

(Use light year units to support your claim) Conclusion Quick Write: Explain why it is currently impossible for human space travel outside our Solar System (Use light year units to support your claim)