Search found 5510 matches

by brian livesey
Wed Nov 11, 2020 4:06 pm
Forum: Telescopes and instruments
Topic: Choosing my first telescope
Replies: 3
Views: 57

Re: Choosing my first telescope

I need to add that the equatorially-mounted 'scope doesn't register on my PC, so I don't know how big the mounting is, but it needs to be free from vibration. If it's only a little one, reject it. Usually, amateur astronomers do a sort of apprenticeship, by starting with a small telescope for learni...
by brian livesey
Wed Nov 11, 2020 11:26 am
Forum: Telescopes and instruments
Topic: Choosing my first telescope
Replies: 3
Views: 57

Re: Choosing my first telescope

If it's photography you aim for, the equatorialy-mounted 'scope would be the most suitable of your trio. The mounting would have to be very accurately positioned for your latitude.
by brian livesey
Tue Nov 10, 2020 6:55 am
Forum: Astrophysics
Topic: How an ice age begins and ends
Replies: 2
Views: 73

Re: How an ice age begins and ends

Just make sure you have enough winter woolies Cliff, when the next ice age comes along :wink: .
by brian livesey
Mon Nov 09, 2020 6:44 pm
Forum: Visual Satellite Observing
Topic: China's 6G satellite
Replies: 0
Views: 31

China's 6G satellite

China has launched a satellite that it claims will be far faster than 5G. The satellite uses high frequency terahertz waves, but the telecoms industry is some years away from agreeing on 6G's specifications, so whether this new development will make it into the final standard is uncertain. A nationa...
by brian livesey
Sun Nov 08, 2020 9:25 pm
Forum: Visual Satellite Observing
Topic: Black Arrow comes home
Replies: 19
Views: 3294

Re: Black Arrow comes home

Some rockets have been launched at sea. Is there anything to stop them sailing down to,say,the Tropic of Cancer and launching from there?
by brian livesey
Sat Nov 07, 2020 5:23 pm
Forum: Astrophysics
Topic: K2-141b: a bizzare exoplanet
Replies: 1
Views: 34

K2-141b: a bizzare exoplanet

Astrophysicists have discovered one of the most "extreme" exoplanets so far. The researchers at McGill University, York University and the Indian Institute of Science Education used computer simulations to predict the conditions on K2-141b. The planet is so close and locked to its parent star that t...
by brian livesey
Fri Nov 06, 2020 6:42 pm
Forum: Observing
Topic: A Magnificent Mess of Sunspots
Replies: 2
Views: 26

Re: A Magnificent Mess of Sunspots

There are lots of Ellerman Bombs on this feature. See today's www.spaceweather.com .
by brian livesey
Fri Nov 06, 2020 10:50 am
Forum: Gallery
Topic: Messier 103
Replies: 2
Views: 23

Re: Messier 103

Another little Jewel Box :D .
by brian livesey
Mon Nov 02, 2020 7:21 pm
Forum: General chat
Topic: Strange Times
Replies: 5
Views: 82

Re: Strange Times

The Rocky Mountains also affect the weather here. Cold winds descend from the Arctic over the Great Plains, then, are deflected by the Rockies and turn eastwards, heading over the Atlantic to bring rainbearing cloud to Europe. Then, there's the influence of the Tibetan Plateau and Himalayas on us .....
by brian livesey
Mon Nov 02, 2020 3:17 pm
Forum: General chat
Topic: Strange Times
Replies: 5
Views: 82

Re: Strange Times

It's the hurricane season across the pond. A number of recent Atlantic anticyclones that have been queuing up to drench and blow us away are the remnants of hurricanes.
by brian livesey
Sun Nov 01, 2020 6:02 am
Forum: Gallery
Topic: Messier 33
Replies: 3
Views: 33

Re: Messier 33

The foreground stars on the face of the Galaxy give depth to the image.
by brian livesey
Sat Oct 31, 2020 9:49 pm
Forum: Gallery
Topic: Messier 33
Replies: 3
Views: 33

Re: Messier 33

There's a patch of nebulosity to the right of M33. Is this a far flung part of the galaxy or something else that's unconnected to it? It's a nice image of the Galaxy.
by brian livesey
Sat Oct 31, 2020 8:04 pm
Forum: Light pollution
Topic: Light pollution's wasted energy seen from space
Replies: 1
Views: 39

Re: Light pollution's wasted energy seen from space

Light pollution is one example of the colossal waste being generated by society at this point in time, and it's getting worse.
by brian livesey
Sat Oct 31, 2020 12:06 pm
Forum: Space exploration
Topic: China's Mars probe latest
Replies: 0
Views: 24

China's Mars probe latest

China's space agency has announced that its Mars probe, Tianwen ( "question to heaven" ), launched in July, will arrive at Mars in February. This coincides with the arrival of NASA's Perseverance lander and the United Arab Emirate's Hope orbiter. The probe is now 9.5 million miles from Earth and its...
by brian livesey
Fri Oct 30, 2020 6:54 pm
Forum: Astrophysics
Topic: Lonesome planet
Replies: 0
Views: 29

Lonesome planet

Astrophysicists have known for some time that there are wandering planets, unattached to stars, in the galaxy. In 2011, a team discovered ten such wanderers,but all of them are Jupiter-sized bodies. Now, a much smaller wanderer has been discovered. It's size is estimated to have a mass be between Ma...