1,392 reputation
1520
bio website msquant.sourceforge.net
location Århus, Denmark
age 49
visits member for 3 years, 8 months
seen 19 hours ago

(Last updated 2014-03-04.)

I am mostly interested in making scientifically important observations, like timing occultations of or by Solar System bodies and measuring variable stars.

I am also interested in citizen science projects and participate in some of them, like Galaxy Zoo.

I have been an amateur astronomer since 1975 and have worked at the European Space agency's (ESA) technical centre in Holland, ESTEC , on the ARISTOTELES mission, an earth gravity mapping mission.

Approximate coordinates: 55°20 N, 10°20 E


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Mar
4
revised Why does sound travel faster in iron than mercury even though mercury has a higher density?
Copy edited. Added units.
Mar
2
revised Pouring water in an aircraft while upside down?
Copy edited.
Feb
23
revised Speed of sound at temperatures below 0 °C
Added proper units, etc.
Feb
23
revised Speed of sound at temperatures below 0 °C
Clarified that the unit for T is degree Celcius (this is clear from the answer). Changed away from second person. Copy edited.
Feb
11
revised Speed of sound at temperatures below 0 °C
Copy edited. Used another form of a unit.
Jan
30
revised Why is acceleration expressed as m/s/s?
Copy edited. (its = possessive, it's = "it is" or "it has". See for example <http://www.wikihow.com/Use-its-and-it's>.)
Jan
21
revised Does Super Mario physics work in reality?
Copy edited.
Jan
21
revised If the universe could emerge from nothing, what about physical laws?
Copy edited. Added some context. Removed meta information (this belongs in comments, if any).
Jan
20
revised Has the use of the holographic principle of string theory in condensed matter physics silenced the skeptics?
Added some context. (its = possessive, it's = "it is" or "it has". See for example <http://www.wikihow.com/Use-its-and-it's>.) Removed follow-up question - they belong in comments to the question.
Jan
18
revised When an object casts a shadow, why are there different shades of that shadow?
Copy edited.
Jan
18
revised Very strange shadow phenomenon
Copy edited.
Jan
15
revised Does the Earth's rotation affect an object in the stratosphere?
Copy edited.
Dec
31
revised Why is a proton assumed to be always at the center while applying the Schrödinger equation?
Copy edited.
Dec
9
revised Alcubierre warp bubble effect on gravity and space
Copy edited. Broke down the wall of text. Added some context.
Dec
8
revised Interaction of external light or matter and an Alcubierre warp bubble
Added context, etc.
Nov
3
revised Can extra-solar gamma rays reach the Earth's surface?
Made the image inline. Applied some formatting to emphasise that there *might* be a window beyond the highest energy shown.
Oct
26
revised Where does the extra force generated by a lever come from?
Copy edited.
Sep
25
revised Frames of reference: Inertial and accelerated - and jerked, snapped, crackled and popped?
Copy edited (e.g. ref <http://english.stackexchange.com/questions/2429>, but the term for a broader audience would not be accepted).
Sep
4
revised What does electroweak vacuum lifetime refer to?
Copy edited.
Sep
4
revised How can bubble universes collide in eternal inflation?
Copy edited.