Scale of Earth, Sun, Galaxy, and Universe - Page 7
Questions
- How would you imagine the size of the universe will change in the future?
- Do astronomers know how many galaxies are in the universe?
- What is the perihelion and aphelion of earth? How are these distances calculated?
- Is the Moon bigger than Mercury?
- What is the nearest star in our galaxy?
- Exactly how big is earth compared to the universe?
- How many planets typically surround one star?
- One estimate is that there are 1010 stars in the Milky Way galaxy, and that there are 1010 galaxies in the universe. Assuming that the number of stars in the Milky Way is the average number, how many stars are in the universe?
- Is Jupiter the largest planet in the universe?
- Which is the most distant: a M main-sequence star or an M giant star?
- Does the universe have a top and bottom? If so, would it be resting on something or is it free falling?
- What is the closest galaxy to us?
- Why can the structure of the universe be compared to soap bubbles?
- How close is the nearest star in miles?
- How many astronomical units would a parsec contain?
- If parsec is the distance that light travels in 3.26 years. How many kilometers does light travel in 1.0 parsec?
- You measure the parallax angle for a star to be 0.1 arcseconds. What is the distance to this star?
- What is the nearest galaxy?
- Is the distance between sun and earth a constant?
- What are the sizes of Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto?