Search found 336 matches

by KendalAstronomer
Sat May 21, 2005 3:48 pm
Forum: Telescopes and instruments
Topic: flocking???
Replies: 9
Views: 8538

Yes, it seems to be about reducing light reflected off the inside:

http://www.cloudynights.com/howtos2/flock.htm

this shows a flocked telescope, with a little info on why.
by KendalAstronomer
Thu May 19, 2005 7:12 pm
Forum: Astrophysics
Topic: Extra-solar planets
Replies: 18
Views: 14545

There may be limiting factors for rocky planets, but it depends on geography. The British have a loose definition of the lower limit of a rocky planet being when the body is big enough to be fully differentiated. During the course of evolution, the theory goes, the planets are hot liquid for a time ...
by KendalAstronomer
Wed May 18, 2005 7:59 pm
Forum: Astrophysics
Topic: Extra-solar planets
Replies: 18
Views: 14545

Brown Dwarves do shine of their own light, just not in visible wavelengths. The definition is they are not massive enough to burn hydrogen through fusion. They are massive enough to burn deuterium through fusion though, and even after that, they will shine through gravitational contraction - as Jupi...
by KendalAstronomer
Mon May 09, 2005 6:48 pm
Forum: Astrophysics
Topic: Core Accretion Model vs Disk Instability Model
Replies: 8
Views: 8626

Hi joe, yes, ignore me when I try to use particular words like "evaporate", just my mind wandering or bad habits I've picked up... The cores of Gas Giants are referred to as having 'metallic' state gas inner cores as a result of two things. We know they have gas - and have to extrapolate down, sayin...
by KendalAstronomer
Sun May 08, 2005 12:26 pm
Forum: Astrophysics
Topic: Core Accretion Model vs Disk Instability Model
Replies: 8
Views: 8626

To answer the qustion on why there is less gas around the terrestrial planets than the gas giants - over the course of the evolution of the solar system, gas will be evaporated by solar radiation and scavenged by the solar wind. How much goes depends on the closeness to the Sun - more radiation and ...
by KendalAstronomer
Sat Apr 30, 2005 3:16 pm
Forum: Forthcoming meetings and events
Topic: Kendal AS meetings
Replies: 0
Views: 2936

Kendal AS meetings

This page gives the subject and location of our meetings about a week or so in advance:

http://www.PhilipStobbart.co.uk/astronomy/meetings.html

Hope to see you all there...