Top Posters
Since Sunday
f
3
b
2
e
2
b
2
j
2
E
2
o
2
L
2
m
2
R
2
C
2
b
2
SlideshowReport

Sunspots

Description
Solar features
Sunspots
On the solar surface
Dark center, the umbra, surrounded by a lighter region, the penumbra
Dark color is due to a cooler temperature (1500 K less than the solar surface)
Follow an 11-year cycle
Large spots are strongly magnetized
Pairs have opposite magnetic poles
Related Images
Add Comment
Explore
Post your homework questions and get free online help from our incredible volunteers
  419 People Browsing
Your Opinion

Previous poll results: How often do you eat-out per week?