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
pzkpfw
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.
pzkpfw
Order of Kilopi
Find latest posts
Find latest started threads
Mini Statistics
Join Date
2005-Jan-28
Avatar
More
1
Friend
grapes
More
Albums
Where the money goes
2009-Aug-13
Recent Visitors
The last 4 visitor(s) to this page were:
KaiYeves
,
Squink
,
Swift
,
ToSeek
This page has had
15,780
visits
Tab Content
pzkpfw's Activity
About Me
Friends
Tab Content
All
pzkpfw
Friends
Photos
New Activity (
)
Older Activity
Today,
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
2 replies | 43 view(s)
Today,
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
6 replies | 69 view(s)
Yesterday,
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 | 1737 view(s)
Yesterday,
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
29 replies | 314 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
2510 replies | 76698 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 | 442 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
2510 replies | 76698 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 | 324 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 | 442 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 | 324 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 | 442 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 | 268 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
1561 replies | 53653 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 | 268 view(s)
2013-May-13,
07:55 PM
pzkpfw
replied to a thread
Coming to America
in
Off-Topic Babbling
Off to work soon, so just a quick - thank you - to everybody. Already some Cultural Learnings of America for Make Benefit Kiwi. (2nd movie title...
see more
20 replies | 403 view(s)
2013-May-13,
08:05 AM
pzkpfw
started a thread
Coming to America
in
Off-Topic Babbling
My Daughter is doing a year of work at DisneyWorld; it's the perfect opportunity for the rest of us to visit the U.S. too (heck, they almost speak...
see more
20 replies | 403 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 | 268 view(s)
2013-May-12,
05:47 PM
grapes
replied to a thread
Really trivial stuff that bugs you
in
Off-Topic Babbling
Only in the last hundred years http://en.m.wikipedia.org/wiki/Cootie_(game)
see more
2510 replies | 76698 view(s)
2013-May-11,
02:44 AM
pzkpfw
replied to a thread
Really trivial stuff that bugs you
in
Off-Topic Babbling
Any number of shows (e.g. "{country}'s got talent" type stuff) are spoiled by silly editing and camera work. Very annoying to hear the studio...
see more
2510 replies | 76698 view(s)
2013-May-11,
02:40 AM
pzkpfw
replied to a thread
My Frustration with the Life In Space forum
in
Forum Introductions and Feedback
I think in the OP, "mild" is mistakenly spelled as "wild".
see more
170 replies | 3634 view(s)
More Activity
No More Results
About pzkpfw
Basic Information
About pzkpfw
Biography:
Netherlands born. Kiwi raised.
Location:
New Zealand
Interests:
Wishing I were riding.
Occupation:
Self employed, mostly programmer.
Signature
Get up, a get-get, get down.
Statistics
Total Posts
Total Posts
9,268
Posts Per Day
3.05
Albums
Total Albums
1
Total Pictures
2
Albums Created by pzkpfw
General Information
Join Date
2005-Jan-28
Referrals
4
1
Friend
grapes
Moderator
Showing Friends 1 to 1 of 1