1. First – Our Solar System Sun: It is a _____undergoing _____________, so it gives off ______ and _____. Planets: ______ stars (our Sun), don’t give off ______, may only _______ it. Satellites (______): orbit _______, don’t give off ______, may only _______ it. Asteroids: like little ______ planets ________ the Sun. Meteoroids: clumps of ____ in space, but not necessarily with an _____. Comets: dirty _________ of ice and dust orbiting the ____. starnuclear fusion lightheat orbit lightreflect moonplanets lightreflect metalorbiting dirt orbit snowballs Sun

2. Second – Stars They are very ________ to______. Stars begin as glowing gas ______ known as ________ and most end as _______ surrounded by nebulae. Red Stars: burn _____ and ____, live _______ of years, and end as heavy little _______. Yellow Stars: like our ____, live _______ of years, and end as _____________________. Blue Giant Stars: live _______ of years, explode and end as rapidly spinning _______. difficultstudy nebulae clouds cinders slowcooltrillions cinders Sunbillions Dense white dwarf stars millions pulsars

3. Second – Stars Super Giant Stars: explode and end as a ______ dense cinder whose ______ is so great that nothing can_______, not even ____. This is known as a __________. The closest star, ______________, is _____ years away, so the _____ we see from it tonight is actually ____ years old. light Black Hole four light four Alpha Centauri super gravity

4. Third – Galaxies Galaxies are made of ________, dust, billions of _____ and objects ________these stars. Many ____________ put together create a ______. The nearest galaxy to us is ___________. (It is __________________ light years away.) solar systems galaxy Andromeda 2,200,000 (2.2 x 10⁶) stars nebulae orbiting

5. Fourth – Universe The universe is made of _______ of _________ and a lot of _______ space. galaxiesmillions empty

6. Space Travel The universe is so ____ that the only way to measure it is by using __________. A light year is the ________ a beam of _____ would travel in one _____. Light travels _______ miles per _____. That means it can travel _____ times around the ______ in one _______. At that speed, light can travel __________ ________________________ miles in one year. Remember, it takes _____ years for the light from the nearest _____ to reach Earth Light years big distancelight year 186,000hour 7 1/2 Earthsecond Six trillion 6,000,000,000,000(6 x 10¹²) four star

7. Let’s look at some other travel times DestinationJet 600 miles/hour Rocket 25,000 miles/hour Sunbeam 186,000 miles/hour Moon Sun Mercury Venus Mars Jupiter Saturn Uranus Neptune Pluto Alpha Centauri Sirius 16.5 days9.4 hours1.2 seconds 17 years, 8 months4 months8.5 seconds 10 years, 10 months3 months5 minutes 5 years, 5 months1.4 months2.5 minutes 8 years, 10 months 318 years, 6 months7 years, 7 months2 hours, 30 minutes 513 years, 2 months12 years, 3 months 4 hours, 2 minutes 690 years, 1 months 16 years, 6 months 5 hours, 25 minutes 4.8 million years114,155.2 years4.2 years 9.6 million years228,310.4 years 8 years, 10 months 74 years, 3 months 1 year, 9 months 35 minutes 150 years, 5 months 3 years, 7 months 1 hour, 11 minutes 2.5 months4 minutes

8. Space Travel Reflect on the Speed of light travel times we have discussed. What surprised you? What did you learn? __________________________________________ __________________________________________

9. Constellations

10. Have you ever locked at the sky and seen pictures in the clouds or stars? Look at the ceiling in our classroom. Can you make a picture out of the dots in the ceiling tiles? What can you see? _________________________________________ _________________________________________ _________________________________________

11. Constellations Since the ___________ of time, people have _________ _______ in the groups of ______ they observe in the night _____. Such _________ star ________ are called ____________. Many ____________ are named for _______ or mythological _________. The __________ is in one of the most well-known constellations. It is part of the ___________ constellation, which means ________. beginning imaginedpicturesstars sky imaginarypictures constellations animals characters Big Dipper Ursa Major Big Bear

12. Constellations The __________ is found in a ___________ from the ____ of the bowl of the __________ and has been used as a point of _________ by __________ for centuries. The other ______ appear to _______ around this point. Astronomers recognize a total of ___ constellations. We do not always see the _____ constellations all the time. Why? ___________________________ _________________________________________ North Starstraight line endBig Dipper reference navigators stars rotate 88 same