Search found 5510 matches

by brian livesey
Thu Nov 19, 2020 6:47 pm
Forum: Observing
Topic: Jupiter-Saturn conjunction
Replies: 3
Views: 52

Jupiter-Saturn conjunction

On Dec.21st a spectacular conjunction of Jupiter and Saturn will occur. The two planets will be just 0.1 degree apart The closest they've been since 1623: www.spaceweather.com .
by brian livesey
Thu Nov 19, 2020 4:04 pm
Forum: Space exploration
Topic: Chang'e-5 to the moon
Replies: 3
Views: 21

Re: Chang'e-5 to the moon

Every square metre of the moon will have been built on by American mining corporations before China can stake a claim.
by brian livesey
Thu Nov 19, 2020 10:44 am
Forum: Space exploration
Topic: Chang'e-5 to the moon
Replies: 3
Views: 21

Chang'e-5 to the moon

China has prepared a huge rocket for launch to the moon at its Wenchang launch site off the coast of Hainan province. On board will be a lunar lander capable of drilling two metres beneath the surface to scoop up rocks and other samples for return to Earth. The moon sampling will be the first since ...
by brian livesey
Wed Nov 18, 2020 7:07 pm
Forum: Space exploration
Topic: The Far Side of the Moon
Replies: 2
Views: 39

Re: The Far Side of the Moon

Many of the general public probably don't realise just how far away some of the planets of our solar system are. If, for example, we could drive to Jupiter at a steady speed of 60 mph, it would take 800 years to arrive there. As a lifelong cyclist, it would take me quite a bit longer, I'd have a bea...
by brian livesey
Wed Nov 18, 2020 7:35 am
Forum: Astrophysics
Topic: Is it a comet? ...
Replies: 1
Views: 22

Is it a comet? ...

No, it's Mercury's sodium tail. See today's www.spaceweather.com .
by brian livesey
Tue Nov 17, 2020 7:40 pm
Forum: General chat
Topic: Strange Times
Replies: 5
Views: 82

Re: Strange Times

We can attribute this year's weather Kay, to a record surfeit of Mid-Atlantic and Carribean hurricanes.
by brian livesey
Tue Nov 17, 2020 7:17 pm
Forum: Observing
Topic: Uranus in a small telescope
Replies: 2
Views: 45

Re: Uranus in a small telescope

That's a neat rigg Bob. I haven't seen Uranus for almost sixty years, and then only once. That was through a friend's homemade reflector with bought optics. Uranus looked greenish, not as we might expect, blue. It was quite low at the time and visible from the centre of town with the unaided eye. Li...
by brian livesey
Mon Nov 16, 2020 1:36 pm
Forum: Telescopes and instruments
Topic: Binocular catastrophes
Replies: 4
Views: 67

Re: Binocular catastrophes

Brass Kershaw binoculars were used by the army. An old army veteran told me that they weren't very good. A problem people often have is knowing which side of a out-of-collimation binocular is at fault. One way that helps is to look through the bins at a vertical line, say, the vertical edge of a wal...
by brian livesey
Mon Nov 16, 2020 11:39 am
Forum: Gallery
Topic: The Sun - again - this time 15th November
Replies: 4
Views: 44

Re: The Sun - again - this time 15th November

How would your first image look Cliff if it was in colour?
by brian livesey
Mon Nov 16, 2020 11:27 am
Forum: Observing
Topic: Comet Atlas C/2020 M3
Replies: 11
Views: 137

Re: Comet Atlas C/2020 M3

Maybe the comet appears to be a ball to us because of its angle of approach, with a tail stretching out-of-sight behind the coma.
by brian livesey
Sun Nov 15, 2020 9:21 pm
Forum: Telescopes and instruments
Topic: Binocular catastrophes
Replies: 4
Views: 67

Re: Binocular catastrophes

I've been collecting binoculars for years Jeff, mostly good secondhand. I still have a few more I can wreck. :wink:
by brian livesey
Sun Nov 15, 2020 7:06 pm
Forum: Observing
Topic: Comet Atlas C/2020 M3
Replies: 11
Views: 137

Re: Comet Atlas C/2020 M3

There doesn't seem to be a tail with this comet, it's just a fuzz ball, which seems to break with convention.
by brian livesey
Sun Nov 15, 2020 3:09 pm
Forum: Telescopes and instruments
Topic: Binocular catastrophes
Replies: 4
Views: 67

Binocular catastrophes

When we've had a binocular for so long that it feels like almost part of us, then, through carelessness, we drop it on a hard floor, throwing it out of collimation, we curse ourselves, knowing that we could have avoided the accident. Recently, carelessness has rendered two pairs of binoculars out of...
by brian livesey
Sat Nov 14, 2020 6:06 pm
Forum: Astrophysics
Topic: The ESA Ariel Space Telescope
Replies: 0
Views: 25

The ESA Ariel Space Telescope

A new space telescope will observe the atmospheres of exoplanets over a period of four years, after launch in 2029. Ariel will be assembled by RAL Space in Oxfordshire. The instrument will be built almost entirely of aluminium, including its 1.1m x 0.7m primary mirror, which will be coated in silver...
by brian livesey
Fri Nov 13, 2020 9:16 pm
Forum: Gallery
Topic: The SUN- 13th November
Replies: 3
Views: 29

Re: The SUN- 13th November

A nice, clean, white light image Cliff. :)