Although sunspots are cooler areas in the photosphere, when they increase in number that tells us the Sun is becoming more active.
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The solution to the solar neutrino problem was:
The solution to the solar neutrino problem was:
Hydrogen lines are weak in M class stars because they have m…
Hydrogen lines are weak in M class stars because they have much less of it than do A class stars.
The Doppler shift is used to find
The Doppler shift is used to find
Nuclear _____________ explains the Sun’s immense and sustain…
Nuclear _____________ explains the Sun’s immense and sustained energy output.
The surface of Europa is most like the Earth’s __________ .
The surface of Europa is most like the Earth’s __________ .
The Sun, at absolute magnitude +4.8, would be one of the bri…
The Sun, at absolute magnitude +4.8, would be one of the brightest stars in the sky if seen from 32 light years distance.
Where on the H-R diagram are the majority of stars that domi…
Where on the H-R diagram are the majority of stars that dominate the night?
Suppose a large flare is detected optically. How long until…
Suppose a large flare is detected optically. How long until radio interference arrives?
A star system where we observe the magnitude to increase and…
A star system where we observe the magnitude to increase and decrease is an _________ .