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sunspots
taches solaires

what were sunspots?
qu'étaient ces taches solaires?

by means of sunspots:
par l'intermédiaire des tâches solaires :

let's observe sunspots.
observons les taches solaires.

2)two sunspots or more:
2)deux taches ou plus :

sunspots display many interesting features.
les taches solaires offrent de nombreuses et intéressantes caractéristiques.

(sunspots, vol. 2, #1, march 1976, pp 1.
(sunspots, vol. 2 no.1, mars 1976, p. 1).

http://skepticalscience.com/solar-activity-sunspots-global-warming.htm
http://www.skepticalscience.com/co2-limits-wont-cool-the-planet.htm

http://www.skepticalscience.com/solar-activity-sunspots-global-warming.htm
http://www.skepticalscience.com/climate-cherry-pickers-falling-humidity.html

http://www.skepticalscience.com/solar-activity-sunspots-global-warming-intermediate.htm
http://www.skepticalscience.com/pielke-sks-disagreements-open-questions.html

sunspot activity
activité des taches solaires