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location Scandinavia
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visits member for 8 months
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Android java developer newbie who tries to be as "agile" about it as I read be the current fashion.

I'm also interested in low level (c, assembler) programming of MCU IC's. Especially radio related (such as zigbee and low energy bluetooth).


2d
comment Pictures of a curious astronomical phenomenon
Its shape is oriented towards the bright light at the bottom of the image. And there is a similar green blur on that same line near the bright light. I would therefor think that it is some kind of optical problem with the equipment and not a real celestial phenomenon. The bright light has a greenish arc above it. Maybe it has to do with the green vegetation in the foreground?
Oct
21
comment What is the angular diameter of Earth as seen from the Moon?
google.com/…
Oct
19
comment How near to Earth do comets pass?
I didn't know that so small objects were classified as comets.
Oct
19
comment How near to Earth do comets pass?
Interesting. So Siding Spring really comes unusually close to Mars, or to any little terrestrial planet. Possibly the closest any comet ever did get in historic times, it seems. Today.
Oct
19
asked How near to Earth do comets pass?
Oct
16
comment Evolution of Life
What is most reasonable: 1) No one anywhere has ever done what we are doing here and now (how can we know what everyone everywhere has always done?) Then why haven't we discovered what makes us unique? That divine thing is per definition here were we are, still we don't see it, why? Doesn't our unique divinity exist? 2) There was once somewhere space traveling life, and therefor it is eternal and everywhere because the galaxy is so small and old and no event can exterminate interstellar life. We see it already, but we just don't know what to look for so we do not recognize it.
Oct
16
comment Evolution of Life
@Peter U Do you "contact" trees? Since they must be there, and we don't see them, they must be weirder than we can understand.
Oct
15
comment Is early life required for life?
Venus is an unknown planet. Our nearest and most similar. And the planet about which we know the least of all. It might well be the opposite to that old "run away greenhouse gas"-myth, that Venus instead formed with intense water vapor as a greenhouse gas, and later cooled as the water went off into space. Venus, not Pluto, is in fact the planet which existence the IAU denies.
Oct
15
comment Planets and Pluto? Neptune?
Alan is leading the Pluto probe. It is his job to do marketing for this event. Of course he takes advantage of the ridiculous Pluto/planet debacle to bring public attention to his mission and his team. Don't search for logic in PR.
Oct
15
revised Evolution of Life
added 65 characters in body
Oct
15
answered Evolution of Life
Oct
14
comment Are epicycles and mean Earth/Sun actually useful astrophysical concepts?
The Lunar orbit around Earth in a Copernican system, can be turned into perfect circles by using epi-epicycles. Maybe that's why he generalized that concept to all planets, because it makes it work the better as a prediction.
Oct
14
comment Are epicycles and mean Earth/Sun actually useful astrophysical concepts?
An ellipse can be constructed using epicycles, which were their raison d'etre. My point though is that the ancient forcing of perfect circles, caused "artifacts" such as eccentricities and mean positions. I suppose they could've chosen some other geometrical twists. Such as pretzel shaped orbits. But as epicycles conceptually-apparently correspond to the physical Lunar orbit in a heliocentric system, and the "mean Sun" corresponds to the Sun's barycenter, does this say anything about the geometry of space? Did the ancients somehow by pure geometry, unknowingly prevision some basic physics?
Oct
13
asked Are epicycles and mean Earth/Sun actually useful astrophysical concepts?
Oct
12
comment Why didn't Johannes Kepler use data about more planets?
@HDE 226868 I've changed to johannes-kepler.
Oct
12
revised Why didn't Johannes Kepler use data about more planets?
Addes Johannes to Kepler
Oct
11
revised Why didn't Johannes Kepler use data about more planets?
Added "physical" in the last sentence.
Oct
11
asked Why didn't Johannes Kepler use data about more planets?
Oct
8
comment How big would the asteroid belt planet be?
Yes, but that low number might have been caused precisely by the influence of Jupiter. Without Jupiter, it might've been very different.
Oct
6
accepted What known comets are binary?