Home
About Us
The Team
Partners
Sponsors
We are CosmoQuest
Charter
In the Media
Press Releases
Do Science
Moon Mappers
Ice Investigators
Vesta Mappers
Hangouts on Air
Hangouts Viewer
Weekly Science Hour Archive
Weekly Space Hangout Archive
Virtual Star Parties
CosmoAcademy
Classes
Educators' Zone
Science on the Half Sphere
Community
Blog
Calendar
Forum
Social Media
Donate
Register
Help
Remember Me?
@CosmoQuestX
#CQX
What's New?
Forum
FAQ
Calendar
Community
Groups
Albums
Member List
Forum Actions
Mark Forums Read
Quick Links
View Site Leaders
Advanced Search
Member List
Van Rijn
If this is your first visit, be sure to check out the
FAQ
by clicking the link above. You may have to
register
before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.
Van Rijn
Order of Kilopi
Find latest posts
Find latest started threads
Mini Statistics
Join Date
2004-Mar-16
Avatar
More
2
Friends
grapes
The_Radiation_Specialist
Recent Visitors
The last 2 visitor(s) to this page were:
Grant Hatch
,
grapes
This page has had
9,174
visits
Tab Content
Van Rijn's Activity
About Me
Friends
Tab Content
All
Van Rijn
Friends
Photos
New Activity (
)
Older Activity
Yesterday,
06:43 AM
grapes
replied to a thread
How practical is beach soccer?
in
Off-Topic Babbling
Sorta Here's a link that deals wih last month's sixth annual world cup of quidditch: http://worldcupquidditch.com/
see more
11 replies | 94 view(s)
2013-May-23,
10:19 AM
grapes
replied to a thread
Salem/Dallas Oregon, Activity
in
Geology & Planetary Surfaces
A 1.5! North Carolina was thought to be geologically inactive, then they bid for the superconducting supercollider, and installed a seismic...
see more
3 replies | 87 view(s)
2013-May-23,
10:15 AM
grapes
replied to a thread
How practical is beach soccer?
in
Off-Topic Babbling
Or quidditch, played on many campuses
see more
11 replies | 94 view(s)
2013-May-21,
10:03 AM
grapes
replied to a thread
how do i have all my topics/posts deleted and username removed?
in
Forum Introductions and Feedback
We try. I can remember one poster who signed his full name to his initial post. The post was high enough quality that I was certain he'd be around...
see more
22 replies | 1196 view(s)
2013-May-21,
08:12 AM
grapes
replied to a thread
Mechanical advantages of rails?
in
Science and Technology
It's hard to imagine an alternative steel factory without some sort of rail system--you're not going to shuttle hot ladles back and forth on rubber...
see more
53 replies | 727 view(s)
2013-May-20,
03:58 AM
grapes
started a thread
SPF ratings for sunscreens
in
Small Media at Large
From USA Today today: http://m.usatoday.com/article/news/2325341 OK I might believe that SPF ratings are gimmicks, as the article says, but I'm...
see more
8 replies | 158 view(s)
2013-May-20,
03:00 AM
grapes
replied to a thread
Looking for a solid pair of binoculars
in
Astronomical Observing, Equipment and Accessories
The last two links are the same.
see more
10 replies | 394 view(s)
2013-May-19,
06:48 PM
grapes
replied to a thread
Machines in space
in
Science and Technology
Nobody else may have mentioned the effect of cosmic rays on computers and digital cameras, but that sure seems like an issue. Modern machines have a...
see more
36 replies | 1819 view(s)
2013-May-19,
10:12 AM
grapes
replied to a thread
Mechanical advantages of rails?
in
Science and Technology
Simple physics and material strength allows one to calculate number of wheels. A single coal car carries a small hill of rock. (...
see more
53 replies | 727 view(s)
2013-May-17,
08:43 PM
grapes
replied to a thread
Really trivial stuff that bugs you
in
Off-Topic Babbling
Spouse -- Spice Trousers -- Taser Douse -- Dice Souse -- Sots
see more
2563 replies | 78356 view(s)
2013-May-16,
06:43 PM
grapes
replied to a thread
What is the Average Distance Between Earth and Sun?
in
Astronomy
If it is given as 93,000,000 miles, there are two significant digits--it's been rounded to 93 million. Of course, it's 91.5-94.5 million over the...
see more
23 replies | 480 view(s)
2013-May-16,
10:08 AM
grapes
replied to a thread
Really trivial stuff that bugs you
in
Off-Topic Babbling
Interesting. The wiki says it is folk etymology. From http://www.navy.mil/submit/display.asp?story_id=11795 That ship may have sailed! :)
see more
2563 replies | 78356 view(s)
2013-May-15,
04:20 PM
grapes
replied to a thread
About Venus
in
Astronomy
OK, that clears that up. The phrase "null hypothesis" is too general and actually controversial. Why not just say, Hypothesis A, Hypothesis B,...
see more
18 replies | 353 view(s)
2013-May-15,
04:11 PM
grapes
replied to a thread
What is the Average Distance Between Earth and Sun?
in
Astronomy
I think that was their point! :) There is some justification for using the semi-major axis as the average distance, as we've said, and the...
see more
23 replies | 480 view(s)
2013-May-15,
12:39 PM
grapes
replied to a thread
About Venus
in
Astronomy
Not just superficial resemblances, either, but as Shaula mentions, in the DNA as well. Too? What are you calling the null hypothesis? :)
see more
18 replies | 353 view(s)
2013-May-15,
03:36 AM
grapes
replied to a thread
What is the Average Distance Between Earth and Sun?
in
Astronomy
Like Glom, I'd say yes. Aphelion plus perihelion equals major axis, so half of that is the semi-major axis, and Kepler's laws depend upon the...
see more
23 replies | 480 view(s)
2013-May-14,
04:25 PM
grapes
replied to a thread
Lagrange point with a mass, does it create baby L-points?
in
Space/Astronomy Questions and Answers
But isn't the moon of appreciable size? Or, going back to the OP, substantial enough? The moon is large enough, relative to the earth, that some...
see more
14 replies | 283 view(s)
2013-May-14,
02:21 PM
grapes
replied to a thread
Really trivial stuff that amuses you...
in
Off-Topic Babbling
Yesterday, some kids asked which languages I knew. I claimed an additional ability to speak British, and they were impressed, until I admitted it...
see more
1572 replies | 54305 view(s)
2013-May-14,
10:23 AM
grapes
replied to a thread
Lagrange point with a mass, does it create baby L-points?
in
Space/Astronomy Questions and Answers
Putting in a second moon into the earth/moon system would not put you over the 1/25 limit.
see more
14 replies | 283 view(s)
2013-May-12,
07:53 PM
grapes
replied to a thread
Lagrange point with a mass, does it create baby L-points?
in
Space/Astronomy Questions and Answers
L4/L5 are stabile when the large mass is 25 times as massive as the smaller mass. The earth is 80 times the mass of the moon. So, when you say...
see more
14 replies | 283 view(s)
More Activity
No More Results
About Van Rijn
Basic Information
Signature
I say there is an invisible elf in my backyard. How do you
prove
that I am wrong?
The Leif Ericson Cruiser
Statistics
Total Posts
Total Posts
16,659
Posts Per Day
4.96
General Information
Join Date
2004-Mar-16
Referrals
1
2
Friends
grapes
Moderator
The_Radiation_Specialist
Established Member
Showing Friends 1 to 2 of 2