BACK TO 8TH GRADE SCIENCE

Universe_Scale.png
http://pixdaus.com/pics/mfgFtiqVlYHDnTqPSF.jpg

NDMS 11/30 & ODMS 12/1


THE TEST IS COMING!!!!
NDMS - 12/3
ODMS - 12/4

Your astronomy powerpoint is your best study guide. If you are done with your powerpoint, partner up and study for the test by quizzing each other.

NDMS 11/5 & ODMS 11/6

Astronomy Powerpoint


*-* Galaxies
o What are the 3 major types of galaxies?
o What are they made of?
o What is the name of our galaxy and what type of galaxy is it?

*-*Stars
o Why are stars different colors?
o Why do large stars still appear to be so small?
o How do we measure the distance between stars?
o Why is looking into the night sky like looking back in time?
o What are astronomical units?

*-* Light sources
o What objects produce their own light?
o What objects shine by reflected light?
o What causes the phases of the moon?

*-* Smaller bodies
o What are comets and what is their orbit like?
o What are asteroids and what is their orbit like?
o What are the two types of planets in our solar system?

*-* Extra Credit
o Why are most objects in space round?
o Why do most objects in space seem to be revolving around something else?

Grading for Project
50% - information
20% - citation of sources
15% - Being on task during project
15% - Professionalism of presentation

NDMS 11/3 & ODMS 11/4

After the powerpoint, go to the website on TYPES OF GALAXIES. When you are done, work on getting caught up in all your classes before the end of the quarter on Friday.


NDMS 10/30 & ODMS 11/2


For each of the following 5 destinations, find out how long it would take you in each of the 5 vehicles. You will have a total of 25 times to get where you are going.

When you are done with that, read the article below and answer the questions that follow. Make sure to explain your thoughts in as much detail as possible.

http://planetquest.jpl.nasa.gov/TripPlanner/planetZone_tripPlanner.swf

Mega-star explosion most distant object ever seen

April 23, 2009


It took 13 billion years to reach Earth, but astronomers have seen the light of an exploding mega-star that is the most distant object ever detected, two studies published Thursday reported. The stunning gamma-ray burst (GRB) was observed by two teams of researchers in April, and opens a window onto a poorly known period when the Universe was in its infancy. GRBs are the most violent explosions known to exist, and can be 10 million times more luminous than the brightest of galaxies. They accompany the catastrophic death of a massive star, and are probably triggered by the collapse of the star's center into a black hole.

Dubbed GRB 090423, the new discovery was first spotted by the NASA satellite Swift. Astronomers alerted to the find trained several of Earth's largest telescopes skyward just in time to see the gamma-ray burst's fading afterglow. The discovery is especially exciting for scientists because the explosion occurred during the so-called "cosmic dark ages", which started a mere 400,000 years after the Big Bang set the Universe in motion some 13.7 billion years ago. During this period, free electrons and protons combined to form neutral atoms with the same number of positive and negative charges, resulting in an opaque -- or "dark" -- universe.
Not until 800 to 900 million years after the Big Bang were atoms and molecules "re-ionised", or electrically charged, resulting in the relatively transluscent inter-galactic medium we see today.

GRB 090423 flashed and crashed toward the end of these dark ages, making it the oldest object ever seen. "This observation allows us to begin exploring the last blank space on our map of the Universe," said Nial Tanvir, a professor at the University of Leicester and lead author of one of the studies. "It is tremendously exciting to be looking back in time to an era when the first stars were just switching on," said Andrew Levan, a professor at the University of Warwick in Britain and co-author of the same study. The previous record holder for oldest object is at least 150 million years younger than the newly discovered gamma-ray burst. Both studies were published in the British science journal Nature.

http://news.yahoo.com/s/afp/20091028/sc_afp/astronomyspacebigbang_20091028233220

http://d.yimg.com/a/p/afp/20091028/capt.photo_1256772704835-1-0.jpg?x=381&y=345&q=85&sig=HgdevgdSb.VltlNZNYPsAA--
http://d.yimg.com/a/p/afp/20091028/capt.photo_1256772704835-1-0.jpg?x=381&y=345&q=85&sig=HgdevgdSb.VltlNZNYPsAA--

GRB 090423 is the small, very red source in the centre of this image. The red colour is indicative of its great distance - about 13.1 billion light years - since all the optical light has been absorbed by intergalactic hydrogen gas, leaving only infrared light. All the other galaxies and stars in the image are much closer to us and just happen lie in the same part of the sky. (AFP/HO/A.J.Levan & N.R.Tanvir)

Questions

1. Why is looking at stars in the night sky like looking back in time? (HINT)
2. Why do we use light years to measure instead of miles? (HINT)
3. Why does GRB 090423 object show up red? (HINT)
4. How could the discovery of GRB 090423 give us information about the beginnings of the universe?
5. Looking at the picture above, what is the universe mostly made of? (HINT)

If you finish early, work on typeracer.


NDMS 10/28 & ODMS 10/29

- PowerPoint on star size, temperature, and color

- Add the following stars to your HR Diagram

Absolute Magnitude
Temperature
Acrturus
0.65
4,800
Antares
-5.38
2,900
Archernar
-4.00
18,000
Betelguese
-5.09
2,900
Cygni
7.00
5,000
Deneb
-8.73
9,500
Procyon
10.00
9,000
Proxima Centuri
10.00
2,500
Rigel
-5.57
11,000
Sirius
1.43
9,900
Spica
-3.55
19,000
Sun
5.00
5,000
Vega
0.58
8,100


NDMS 10/26 & ODMS 10/27


Go to the Virtual Space Tour and take detailed notes about the Sun, Earth, Moon, asteroid, comet, one other terrestrial planet, and one gas giant.


ODMS 10/7 & NDMS 10/8


Your assignment is to get out there and explore anything and everything related to astronomy. Below is a list of cool stuff that i found, but you can use whatever you find.

WHEN YOU ARE DONE, WRITE A 2-3 PARAGRAPH SUMMARY AND REFLECTION ABOUT WHAT YOU FOUND.

Great site on the scale and timeline of our universe

Comets and Meteors




ODMS 10/9 & NDMS 10/12

Learn the basics of the HR Diagram

Here are more detailed instructions on how to read HR Diagrams

How stars can move on the HR Diagram as they go through their life cycle




When you are done with the two HR Diagram files above, take this quiz.