ASTEROID FLYBY: Approaching from the direction of the sun, mountain-sized asteroid 2014 JO25 will fly past Earth on April 19th approximately 1.8 million km away. NASA says there is no danger of a collision. This unusually bright space rock is about twice as reflective as the Moon. Amateur astronomers may be able to see it in backyard telescopes as a magnitude 11 speck of light during and after the flyby. Got an image? Submit it here.
SOLAR WIND STREAM APPROACHES EARTH: A hole has opened in the sun's atmosphere and it is directly facing Earth. NASA's Solar Dynamics Observatory photographed the structure bisecting the solar disk on April 16th:
NOAA forecasters estimate a 55% chance of polar geomagnetic storms when the solar wind arrives on April 17-18. Arctic twilight will mute the visibility of Northern Lights, but might not overwhelm them completely if the auroras are bright. Monitor the aurora gallery for sightings