Long-term fluctuations in the intensity and inclination of the Earth’s magnetic ... s orbit. Eccentricity is a measure of how much the orbit of a planet deviates from a circle, and ranges from zero ...

David asks: Given that the sun is almost perfectly spherical (not oblate), why do planets orbit the sun in an ellipse? I understand that gravity becomes weaker, the farther away a planet is from ...

spacecraft in an elliptical Earth orbit to begin the first space mission studying the interaction between Earth's and sun's magnetic fields. The four identical spacecraft were launched on an ...

Aditya L1, India's first space-based Sun observatory, has completed its second orbital adjustment, now revolving in an elliptical orbit measuring ... solar radiation and magnetic storms before ...