.(Let's Planet Extra).

1. 4 Ways To Detect Planet
- Radial Velocity
- Astrometry
- Transit Method
- Optical Detection

2. The one ways that make the most sense would be astrometry. Just by one movement you can know a planets mass and its orbit.

3. The Goldilocks Zone is just saying that the planet is ""Just Right"" from the distance of the homestar.

4. If Gilese 581c has life I think that it would look something like mermaid and merman. Then they would be like fish and have whale calls but they would hav like blue eyes. Yes they would be very intelligent unless their water was polluted then they would have deffects to the brain.

5. Yes, I trully do not think that we Humans are the only things that exist. We are not the only planet in this world, our little NASA agency hasn't been to all of these planets, and if there were once dinosaurs and we come from monkey's then why in the world cant there be aliens.