| A | B |
|---|
| Black hole | Light can't escape it |
| The sun is an average... | Star |
| Stage of life sun is in now | Main sequence |
| # of major planets in solar system | 8 |
| # of planets with no moons | 2 |
| # of planets with rings | 4 |
| Between Mars and Jupiter | Asteroid belt |
| Age of the universe | 13.7 billion years |
| Distance light travels in one year | Light-year |
| More than one universe exists | Multiverse theory |
| SETI | Search for ExtraTerrestrial Intelligence |
| All stars are born here | Stellar nebula |
| One Earth rotation | 24 hours |
| One Earth revolution | 365.24 days |
| Next stage in sun's life | Red giant |
| Our galaxy | Milky Way |
| Our type of galaxy | Barred spiral |
| Why we only see 1 side of moon | Its rotation=Its revolution |
| Planet with the longest day | Venus |
| Light-year's length | 5.87 billion miles |
