Astronomy

Mona Evans

A beautiful sunny day might prompt you to wonder why the sky is blue. It's a good question. And it's related to why sunsets and a totally eclipsed Moon are red.

Mona Evans

Sedna is the Inuit goddess of the sea and its creatures. She abides in the cold, dark depths of the northern seas. Her astronomical namesake is a probable dwarf planet located in the cold, dark distant reaches of the Solar System.

Mona Evans

Each year we're warned of grim non-events. The predictions don't come to pass, but still keep coming. Some favorites are a massive asteroid impact, Nibiru looming and the dangers of a supermoon. In 2019 there was also imminent lunar collapse and some concern about the alien base on Mercury.

Mona Evans

Some people think that Venus could be habitable. And perhaps you might daydream about being closer to the Sun when the long winter nights come, and the temperature drops. After all, "Earth's twin" should be a nice place, shouldn't it? Let's talk about that.

Mona Evans

The women of Harvard Observatory worked hard for their meager wages. And the director wanted data processed, not theoretical work. Yet some of them made significant discoveries. One of the least known, but considered by some professional astronomers to be the most able, was Antonia Maury.

Mona Evans

Neptune is the planet discovered mathematically and whose detection led to a heated rivalry between British and French astronomers. But who was the first person actually to see Neptune?

Mona Evans

Saint Patrick's Day is associated with the shamrock and the color green. Although there don't seem to be any cosmic shamrocks, there are many green phenomena in the skies. Discover a beautiful green nebula, what excites electrons, and why con men sold “comet pills”.

Mona Evans

Mercury has a moon? Could the Jovian-Plutonian Gravitational Effect give you a floating feeling? Virgin Galactic has bought Pluto and has plans for getting it reinstated as a planet? Nope. April Fool hoaxes and jokes.

Mona Evans

You've made it through the winter and watched the food stores diminish. But the days are getting longer and green shoots are appearing. Spring is on the way. The festivals of the vernal equinox emphasize rebirth and renewal. In many cultures the equinox is also the New Year.

Mona Evans

Titan was a mystery for three and a half centuries. It's a giant moon shrouded in impenetrable clouds, and has only recently begun to share its secrets. Why do scientists say it's like Earth? Is it time to book a vacation to visit the lakes and mountains of Titan?