Unit 1: Astronomy-Discussion Board by https://padlet.com/dcengirela/q6pen531t5b15hqu en-us 2020-10-17 17:17:15 UTC 2025-12-05 05:26:02 UTC hello@padlet.com Entry Ticket: How do you measure Time-Distance in the universe? dcengirela https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/837819113 2020-10-17 17:18:28 UTC https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/837819113 Entry Ticket: How do you measure time and distance in a soccer field? dcengirela https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/837845751 2020-10-17 17:50:03 UTC https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/837845751 What if the aliens who got our radio waves just, you know, rocked out to it? dcengirela https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/837898158 2020-10-17 18:54:49 UTC https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/837898158 How far did human music travel in space? dcengirela https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/837904498 2020-10-17 19:02:11 UTC https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/837904498 Why do we use light instead of sound to measure distance in the universe? dcengirela https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/838278313 2020-10-18 05:06:49 UTC https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/838278313 Reading Review dcengirela https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/839783105 What is a light year?

2. What is the nearest large galaxy to us and how far is it?

3. What does a light year measure?

4. What is the  speed of light and what does it mean?

5. What does the following sentence mean: "We always see the Sun as it was about 8.3 minutes ago". Explain. 

6. In 2016, NASA's Hubble Space Telescope looked at the farthest galaxy ever seen, called GN-z11. It is 13.4 billion light-years away, so today we can see it as it was 13.4 billion years ago. Why is this important to humanity? Explain. 



]]> 2020-10-19 04:42:43 UTC https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/839783105 https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/840874310 2020-10-19 13:14:29 UTC https://padlet.com/dcengirela/q6pen531t5b15hqu/wish/840874310