This year, the first day of Northern Hemisphere summer arrives on June 21 at 9:58 a.m. On this day, the Sun appears highest in our midday sky for the entire year: 68.6 degrees above the horizon ...

It rapidly zooms into the morning sky, reaching an angular distance of 15 degrees from the sun by month's end. Meanwhile, glowing brilliantly, well up in the southern and western sky is Jupiter.

Venus, Mars, Jupiter, Saturn, Uranus, and Neptune were already visible in the night sky after dusk this month, but Mercury joined them on Feb. 28. While it's common to see a few planets line up in the ...

Spending time basking in the sun may be more important than you think. Sure, it's a sensual pleasure and brightens your day. But far beyond that, the summer sun may help you avoid winter depression.

Every second the Sun emits million times more energy than the world consumes ... Is it a threat to us, then? One Sky Project is an international collaboration focused on increasing understanding about ...