Today:
If you can flesh-out the constellation Sagittarius in your mind, then look low in the southeastern sky late tonight, between about 4:00 and 5:00 AM. It looks like Sagittarius will load the half moon into his bow, and will shoot it off the right. This is in fact the direction the moon will travel, but Sagittarius moves with it, only the moon remaining visible for a couple hours after sunrise, before setting in the southwest.
Tuesday:
Just after the sun dips below the horizon, between about 7:45 and 8:15 PM, the fading twilight will afford a last fleeting glimpse of the planet Mercury, along the horizon just north of west. Mercury’s proximity to the sun means that it’s rarely visible, being below the horizon at night, or drowned by the light of the sun when the sun is above the horizon.
Wednesday:
For reasons that scientists don’t yet understand, the aurora borealis, or “northern lights” are seen more frequently in April. The Sun, unusually quiet over the past few years, now shows a significant increase in sunspots and other solar activity, improving our chances of seeing some northern lights over the next few years.