3. The Size and Scale of Things By morn1415 on YouTube in HD (local file)
4. The Size and Scale of Things Scale Model in Green Bank, WV Voyage Model in DC â Jeffrey Bennett
5. The Size and Scale of Things If the Earth is the size of a ping pong ball, how big is the Sun? CC Watchcaddy on Flickr
6. The Size and Scale of Things If the Earth is the size of a ping pong ball, how big is the Sun? Ping pong = 40 mm diameter Diameter Sun = 109 * Diameter of Earth Analog sun -> CC Watchcaddy on Flickr
7. The Size and Scale of Things If the Earth is the size of a ping pong ball, how big is the Sun? Ping pong = 40 mm diameter Diameter Sun = 109 * Diameter of Earth Analog sun -> ~ 14.3 ft diameter about the size of this room! CC Watchcaddy on Flickr
8. The Size and Scale of Things How far away is the ping pong ball from the room?
9. The Size and Scale of Things How far away is the ping pong ball from the room? Our scale: ~1:160,000,000 Distance from Earth to Sun ~ 93 million miles Model distance ->
10. The Size and Scale of Things How far away is the ping pong ball from the room? Our scale: ~1:160,000,000 Distance from Earth to Sun ~ 93 million miles Model distance -> ~3081 ft, or the distance to the Rotunda
12. The Size and Scale of Things Sun Earth Mercury Venus Mars
13. The Size and Scale of Things Jupiter Saturn to Mars Uranus Neptune Outer Edge of Kuiper Belt
14. The Size and Scale of Things 2:37 Sixty Symbols on YouTube Local HD
15. The Size and Scale of Things Now, pretend the Sun is a ping pong ball. Where is the nearest star? MSX/IPAC/NASA
16. The Size and Scale of Things Now, pretend the Sun is a ping pong ball. Where is the nearest star? Alpha Centauri (3 star system) 4.2 light years or 1.3 parsecs away 2.5 x 1013 miles (25,000,000,000,000 miles) The ping pong ball would be -> MSX/IPAC/NASA
17. The Size and Scale of Things Now, pretend the Sun is a ping pong ball. Where is the nearest star? Alpha Centauri (3 star system) 4.2 light years or 1.3 parsecs away 2.5 x 1013 miles (25,000,000,000,000 miles) The ping pong ball would be -> 714 miles away MSX/IPAC/NASA
18. The Size and Scale of Things Ping pong ball Ping pong ball
19. The Size and Scale of Things Those are just two nearby ping pong balls in a group of 100 billion, spanning millions of miles ⊠a galaxy spanning thousands of light years, or hundreds of quadrillions of miles! Nick Risinger
20. HOW do we know? Distance to Venus -> radar The ratios of planetary distances were known, but an accurate measurement to Venus using the speed of light solidified the numbers NASA NASA
21. HOW do we know? Nearby stars measured by parallax CC NoisyAstronomer
22. HOW do we know? More distant objects use indirect methods, building a âdistance ladderâ Star spectral types Variable stars Supernovae Redshift Ned Wright DOE NNSA ASC/Alliance Flash Center at U of Chicago
23. The Universal Context The Millenium Simulation (http://www.mpa-garching.mpg.de/galform/millennium/) local local better
26. Expansion Elementary, my dear Humason! The further away a galaxy is, the faster it is moving away! Beautifully demonstrated by distant supernovae all the way to large distances measured today.