See Jupiter and Saturn on Monday 21 December

Fri 18 Dec 2020, 14:18

Apparently they are at the closest approach to Earth in some 400 years so should be quite bright, positioned just a little to the right of an 11% Moon crescent. Apparently at their closest they might merge into a single bright light.

Wed 16 Dec 2020, 19:06 (last edited on Fri 18 Dec 2020, 16:04)

For parentsof children between 8 and 12 following science at school and other parents homeschooling.

There is information here. UPDATED ON 18 DECEMBER

Other astronomers welcome.

Let's hope for a warm, clear and dry evening.

This sight hasn't been seen in nearly 800 years. The orbits of Jupiter and Saturn align every 20 years. According to NASA, this is because Jupiter orbits the sun every 12 years while Saturn's orbit takes 30 years. So every couple of decades, Jupiter overtakes Saturn.

For those who would like to see this phenomenon for themselves, here’s what to do (USA perspective):

Find a spot with an unobstructed view of the sky, such as a field or park. Jupiter and Saturn are bright, so they can be seen even from most cities.

An hour after sunset, look to the southwestern sky. Jupiter will look like a bright star and be easily visible. Saturn will be slightly fainter and will appear slightly above and to the left of Jupiter until December 21, when Jupiter will overtake it and they will reverse positions in the sky.

The planets can be seen with the unaided eye, but if you have binoculars or a small telescope, you may be able to see Jupiter’s four large moons orbiting the giant planet.

Best wishes

Alan Harrison