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For reasons researchers don’t fully understand,auroras love equinoxes. At this time of year even a gentle gust of solar wind can spark a bright display. Tomorrow, Sept.23rd, is the northern autumnal equinox. Perfect timing: a CME is expected to deliver a glancing blow to Earth’s magnetic field on Sept. 23rd. The impact will probably be weak, but on the first night of autumn, weak may be strong enough. High-latitude sky watchers should be alert for equinox auroras. And no – there will be no comet impact tomorrow.
Every night, a network of NASA all-sky cameras scans the skies above the United States for meteoritic fireballs. Automated software maintained by NASA’s Meteoroid Environment Office calculates their orbits, velocity, penetration depth in Earth’s atmosphere and many other characteristics. Daily results are presented here on Spaceweather.com. On Sep. 22, 2015, the network reported 19 fireballs so far.
Potentially Hazardous Asteroids (PHAs) are space rocks larger than approximately 100m that can come closer to Earth than 0.05 AU. None of the known PHAs is on a collision course with our planet, although astronomers are finding new ones all the time.On September 23, 2015 there were 1611 potentially hazardous asteroids.
Top Mainstream/Alternative News Headlines from around the Web for September 22, 2015