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 ____.

star nuclear fusionlightheat

orbitlight reflect

moon planetslight reflect

metal orbiting

dirtorbit

snowballsSun

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 _______.

difficult study

nebulaecloudscinders

slow cool trillionscinders

Sun billionsDense white dwarf stars

millionspulsars

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.

lightBlack Hole

fourlight

four

Alpha Centauri

supergravity

gravity

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 systemsgalaxy

Andromeda2,200,000 (2.2 x 10⁶)

starsnebulae

orbiting

Fourth – Universe

•The universe is made of _______ of _________ and a lot of _______ space.

galaxiesmillionsempty

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 yearsbig

distance lightyear

186,000 hour7 1/2

Earth secondSix trillion

6,000,000,000,000 (6 x 10¹²)four

star

Let’s look at some other travel times

Destination Jet600 miles/hour

Rocket25,000 miles/hour

Sunbeam186,000 miles/hour

Moon

Sun

Mercury

Venus

Mars

Jupiter

Saturn

Uranus

Neptune

Pluto

Alpha Centauri

Sirius

16.5 days 9.4 hours 1.2 seconds

17 years, 8 months 4 months 8.5 seconds

10 years, 10 months 3 months 5 minutes5 years, 5 months 1.4 months 2.5 minutes

8 years, 10 months

318 years, 6 months 7 years, 7 months 2 hours, 30 minutes

513 years, 2 months 12 years, 3 months 4 hours, 2 minutes

690 years, 1 months 16 years, 6 months 5 hours, 25 minutes4.8 million years 114,155.2 years 4.2 years

9.6 million years 228,310.4 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 months 4 minutes

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

Constellations

Constellations•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?___________________________________________________________________________________________________________________________

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 ________.

beginningimagined pictures stars

skyimaginary pictures

constellationsconstellations animals

charactersBig Dipper

Ursa MajorBig Bear

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 Star straight lineend Big Dipper

reference navigatorsstars

rotate88

same