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Jan
16
comment Are there ever any simultaneous transits of both Mercury and Venus as seen from the Earth?
That is one mondo excellent answer!
Jan
16
accepted Are there ever any simultaneous transits of both Mercury and Venus as seen from the Earth?
Jan
15
asked Are there ever any simultaneous transits of both Mercury and Venus as seen from the Earth?
Jan
2
awarded  Yearling
Jan
2
awarded  Yearling
Nov
3
awarded  Necromancer
Sep
22
comment Earth's gravitational pull on ISS
Centrifugal force is completely out of place here. In a centrifuge, the objects inside it are driven against the outside walls. No object onboard the ISS is being driven against the outside walls -- they are orbiting with the station. In other words, they and the ISS are falling around earth, entirely subject to gravity (which is NOT cancelled out).
Jan
22
revised Calculate latitude and longitude based on date and sun
added 364 characters in body
Jan
22
revised Calculate latitude and longitude based on date and sun
adding more detail
Jan
22
revised Calculate latitude and longitude based on date and sun
adding more detail
Jan
22
comment Is the light we see from stars extremely old?
Yes, @StanLiou, this is a quirk, but as you say, at least a bit interesting. As to "same" vs "different" photons, well, there are a lot of mysteries in the universe, and this is one of them.
Jan
22
answered Is the light we see from stars extremely old?
Jan
22
answered Calculate latitude and longitude based on date and sun
Jan
21
awarded  Quorum
Jan
17
awarded  Organizer
Jan
17
revised What happens to the energy from a GRB?
retag and superscript
Jan
17
revised Are Gamma Ray Bursts of galactic or extragalactic origin?
Syntax improvement in title
Jan
17
revised What happens to the energy from a GRB?
GRB != RGB
Jan
17
suggested approved edit on What happens to the energy from a GRB?
Jan
17
suggested approved edit on Are Gamma Ray Bursts of galactic or extragalactic origin?