Tag: night sky

Comet Wirtanen will soon pay Earth its closest-ever visit. It should be large and blobby-looking, appearing as a fuzzy glob ...

The Martian surface air is 30 times thinner than the air atop Mount Everest. And if that weren’t bad enough, ...

One word is so consistently mispronounced that I’ve been repeatedly corrected when I say it the right way, which is ...

Friday-Saturday, Sept. 14-15: There’s probably a supermassive black hole in the core of every galaxy. Ours has the weight of ...

A rainbow requires a sunshower. It must be raining. But the CZA can appear against a blue sky.

We always assume aliens would know about circles and pi, and realize that hydrogen is the element that dominates the ...

This week we face into the winter Milky Way, the spiral arm that’s opposite the galactic core. The Aztecs and ...

Of the ten first-magnitude stars in the heavens, eight of them will surround the Moon. You’ll notice that the star ...

The 1918 pandemic killed as many people in one year as the Black Death claimed in a century. But it ...

When the universe’s first- and fourth-most-abundant elements combine, the result is often a gas that, surprisingly, has recently cleaned up ...

The Autumnal Equinox takes place on Friday afternoon, Sept. 22, at 4:02 p.m. At that moment, Earth will angle perfectly ...

The radiation would start to arrive three to ten hours after the blast, and consist of fine dust particles. Breathing ...

Some are pure fun. They’re fun either because they sound intriguing, or else denote a little-known phenomenon that deserves wider ...