| EXOPLANETS—PLANETS OUTSIDE OUR SOLAR SYSTEM | deu6e_ch5_2.html | 54a47ad7757a2e187b000000 |
| 5-1 Protoplanetary disks are a common part of the star-forming process | deu6e_ch5_3.html | 54a47ad7757a2e187b000000 |
| 5-2 Astronomers have at least seven different ways of detecting planets outside our solar system | deu6e_ch5_4.html | 54a47ad7757a2e187b000000 |
| 5-3 Exoplanets orbit a breathtaking variety of stars | deu6e_ch5_5.html | 54a47ad7757a2e187b000000 |
| 5-4 Exoplanets with a wide range of sizes, masses, and compositions have been observed | deu6e_ch5_6.html | 54a47ad7757a2e187b000000 |
| 5-5 Stars with multiple planets have been observed | deu6e_ch5_7.html | 54a47ad7757a2e187b000000 |
| 5-6 Many exoplanets have extraordinary orbits, as compared to those in our solar system | deu6e_ch5_8.html | 54a47ad7757a2e187b000000 |
| 5-7 Planets that are not orbiting stars have also been observed | deu6e_ch5_9.html | 54a47ad7757a2e187b000000 |
| 5-8 There are billions and billions of planets | deu6e_ch5_10.html | 54a47ad7757a2e187b000000 |
| 5-9 Planets with liquid water are being discovered | deu6e_ch5_11.html | 54a47ad7757a2e187b000000 |
| 5-10 The search for life on exoplanets is under way | deu6e_ch5_12.html | 54a47ad7757a2e187b000000 |