The star Vega is 25 light years away. When did the light that is now reaching us leave Vega?

If the Sun were the size of a basketball, how big would Earth be?

How old is the Universe?

Based on the answer to the previous question, about how far away is the farthest observable part of the Universe?

If I offer to give you 1 million dollars right away or $2 the first day and double the previous day's amount each day for 30 days, which option gives you more money?

True or False. The attached image is an image of the Milky Way

True or False: The Solar System is bigger than the Milky Way

True or False: If we send astronauts to Mars, we won't be able to talk to them instantaneously

If I am one light-nanosecond away from you, how old do I appear to you compared to my actual age?

Which one is larger?

True or False: the two-way communication time with an astronaut in Mars is always the same

True or False: The ASTRO 1500 Trivia questions will be very similar to questions on the exams

How can astronomers learn about the Universe at times in the past?

If you had to guess, how times would you have to fold an enormous piece of paper for it to have a thickness equal to the distance of the Moon?

True or False: All of the planets could potentially fit between the Earth and the Moon.

True or False: The in-class Lecture Challenges are similar to exam questions

Approximately, how many stars are in the Milky Way?