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1d
awarded  Popular Question
1d
awarded  Nice Question
Nov
21
accepted Is axial tilt direction correlated with semi-major axis direction?
Nov
21
accepted Appearance (frequency) ranking of stars?
Nov
21
asked Is axial tilt direction correlated with semi-major axis direction?
Nov
20
comment How does 67P rotate?
40 degrees - that suggests a pretty big "polar night" area. Now if we could get direction of the tilt relative to orbital semi-major axis (at what distance from the Sun equinox happens?)...
Nov
20
accepted How does 67P rotate?
Nov
20
asked How does 67P rotate?
Nov
16
accepted What are the metrics of observation conditions?
Oct
22
accepted What is the angular diameter of Earth as seen from the Moon?
Oct
21
comment What is the angular diameter of Earth as seen from the Moon?
@LocalFluff: Gives me a thousand results of angular size of the Moon as seen from Earth.
Oct
21
asked What is the angular diameter of Earth as seen from the Moon?
Oct
20
comment Are ascending node of sun, the point of intersection of prime meridian and equator and center of earth all collinear?
@barrycarter: In fact, I meant the momentary celestial equator for given equinox day - the moment when the point on Earth where the Sun is in zenith crosses the Earth's equator.
Oct
19
awarded  Revival
Oct
18
comment Are ascending node of sun, the point of intersection of prime meridian and equator and center of earth all collinear?
@barrycarter: Could you explain? The celestial equator is a great circle on the imaginary celestial sphere, in the same plane as the Earth's equator. That seems to imply they are always in sync, since one is defined by the other. Did you mean the ecliptic plane? In that case, it intersects the equator plane, and during equinoxes the intersection line happens to pass the Sun (or, if you nitpick at inexactness of the Ecliptic - the Sun passes the Earth equator plane twice a year.) At these moments Earth center, the Equator and the Sun are colinear, but the meridian is entirely random.
Sep
25
awarded  Yearling
Sep
24
awarded  Autobiographer
Sep
5
answered Are ascending node of sun, the point of intersection of prime meridian and equator and center of earth all collinear?
Sep
3
accepted What is the ultimate fate of a cluster of galaxies?
Jul
22
comment Are these facts about moon true?
@StanLiou: Nevertheless, Moon doesn't reverb as if it was hollow.