1,352 reputation
1519
bio website msquant.sourceforge.net
location Århus, Denmark
age 49
visits member for 3 years, 5 months
seen 2 days 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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Jul
3
comment Applying the Maxwell–Boltzmann statistics to astrophysical objects
Re: "Can the Universe be considered in thermal equilibria?". Why equilibria? Why isn't it equilibrium?
Jun
17
comment How long would it take to scan the visible universe for unique signals?
More information about HUDF.
Jun
16
comment What possible science could we do during the 2012 Venus transit?
I observed the entire transit in 2004 using a 200 mm Cassegrain telescope with a mylar solar filter. I was lucky with the weather and was at the right latitude. The "black drop" effect was clearly visible both at ingress and egress. But it is a optical illusion (?).
Jun
13
comment How do astronomers measure the distance to a star or other celestial object?
Parallax is not the only direct distance measurement (although it is less universally applicable (no pun intended)). There is also the convergent method.
Jun
2
comment Can any telescope be used for solar observing?
@Anna Karenina: no, you need a narrow-band filter. A 1.5 Å filter will do for prominences. They are somewhat cheaper than a hydrogen-alpha filter proper. See for instance Solar Observing, section "Solar Prominence Filters".
Jun
1
comment What tools do I need to track an orbit of a mystery object?
How fast was it moving? For example, how long time, approximately, did it take to cross the field of view? 10 seconds, 1 minute, 5 minutes?
Jun
1
comment Scientific value of timing total lunar occultations
Interesting. What is the hit rate on asteroid occultations? Has the Hipparcos data increased it to something more acceptable than 10% in the 1980s?
Apr
12
comment Questions about the Solar System
This question belongs on Astronomy. Wait... It is not created yet (is in the commitment phase), but nearly everybody can help create it!
Nov
14
comment Amount of 2 amperage
Better always use "current" instead of "amperage", especially on a physics site.
Nov
14
comment Amount of 2 amperage
@shk: do you need to add i1 and i2 and reduce to the shortest form?
Nov
10
comment How are neutrons produced from cosmic ray particles?
How about some more specific tags? Like particle-radiation, hadron, baryon, neutron?
Nov
9
comment Can extra-solar gamma rays reach the Earth's surface?
I see no such link, only "No preview available". I may be geographically challenged.
Nov
9
comment Can extra-solar gamma rays reach the Earth's surface?
It is at books.google.com/…, but how can the content be viewed?
Nov
9
comment Can extra-solar gamma rays reach the Earth's surface?
This question needs more tags. Some ideas: electromagnetic-radiation, photon-matter-interaction