Guest
Record your races with a typeracer account:
Create Your Account- Save your race history and scores.
- Customize your profile and racecar.
- It’s free, why not?
Race Result Details |
| Racer | Wei (weihxx) |
| Race Number | 21 |
| Date | Sat, 5 Jan 2019 06:15:02 +0000 |
| Speed |
105 WPM
 Try to beat?
|
| Accuracy | 96.6% |
| Rank | 2nd place (out of 3) |
| Opponents | tajiracer (1st place) |
Text typed:
 
|
If an exoplanet happens to transit its star, we can often determine both its mass and its radius, and hence estimate its density and possibly even its composition. More than 200 transiting hot Jupiters have been measured in this way. But when astronomers calculate their densities the numbers they obtain are generally much lower than predicted by theory.
— Astronomy: A Beginner's Guide to the Universe (7th Edition)
 (book)
by Eric Chaisson, Steve McMillan
(see stats)
|