Astronomers have discovered that the sun had a close encounter with two blazingly hot massive stars around 4.4 million years ...
NASA Chandra X-ray telescope data from galaxy cluster Abell 2146 showed a "shockwave that stretches for some 1.6 million ...
Sunspots AR3664 and AR3663 have been erupting with X- and M-class solar flares. Both sunspots are Earth-facing and could ...
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