'Summer hemisphere' diaporamas de présentation

413 views • 33 slides

ATS 553

493 views • 26 slides

Variability in the thermosphere and ionosphere during small geomagnetic disturbances in April 2002

Variability in the thermosphere and ionosphere during small geomagnetic disturbances in April 2002. L. Goncharenko 1 , J. Salah 1 , A. Coster 1 , W. Rideout 1 , C. Huang 1 , S. Zhang 1 , L. Paxton 2 , Y. Zhang 2 , G. Crowley 3 , B. Reinisch 4 , V. Taran 5

306 views • 19 slides

Day and Night

Day and Night. The Earth. The Earth rotates around the sun on an axis It takes 24 hours to make one rotation. Rotation. When the Earth rotate on its axis, it causes day and night. Watch About Night and Day. Tutorial:

337 views • 11 slides