This ice giant is twenty times farther from the Sun than we are. It circles the Sun lying on its side, so each half the planet is dark for over twenty years at a time. It's the planet Uranus, discovered in 1781 by William Herschel who named it George.

What links the biggest constellation in the sky with the flag of Brazil? Why is the star V Hydrae bright red? How did the hero Hercules vanquish a nine-headed monster?

It's not surprising to find plenty of deep-sky objects in such a big constellation as Hydra. Its varied objects include the Ghost of Jupiter, beautiful globules that are over twice the age of the Sun, and a dramatic grand design spiral galaxy known for its titanic explosions.

William Herschel discovered the planet which was named Uranus after the ancient Greek sky god. Although Uranus has at least 27 moons, most of them weren't discovered until at least the twentieth century.

Lick Observatory lies on a mountaintop overlooking Silicon Valley. Known for major contributions to astronomy, it also has some unique features. Its benefactor James Lick is buried under one of the main telescopes, and it displays original seismogram taken during the 1906 San Francisco earthquake.

Enceladus is the coldest of Saturn's moons and one of the most interesting. It's covered with ice, but under the ice is a liquid ocean. Scientists wonder if there might be life in that ocean.

Everybody recognizes Saturn's rings, but that isn't all that circles the planet. There are shepherd moons, a moon with cold volcanoes erupting, a planet-sized moon, and more. And it took nearly two hundred years for the first seven known moons to be named.

Even being the Saturn's second biggest moon doesn't make Rhea very big. We could set three Rheas down on the USA and have room to spare. It whizzes around Saturn so quickly that a month is only four and a half Earth days long. It's so cold there that ice is as hard as rock.

Saturn's moon Titan is bigger than the planet Mercury. It's also the only moon with a thick atmosphere. In fact the atmosphere is so smoggy, we can't see the surface. How is Titan like Earth?

The winners of the 12th Greenwich Astronomy Photographer of the Year competition were presented online this year. There were two socially distanced presenters. Winners included close-up Andromeda, an ethereal aurora, colorful clouds, and a sad warning of what could be the end of astrophotography.