Level 7 Level 9
5 words 0 ignored
Ready to learn Ready to review
Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.
Surface temperature of our Sun (in ºC)
Up to how far away (in km) would humans still roast from the Sun?
The Star at the centre of our Solar System.
How old is the Sun? (in billion years)
Cooler areas on the Sun.