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18h
awarded  Excavator
19h
revised How many observations does it take to determine the orbit of a TNO
Updated New Horizons section.
20h
suggested approved edit on How many observations does it take to determine the orbit of a TNO
21h
comment How did scientists determine an estimate of the number of planets greater than Sedna's size to exist in the Inner Oort Cloud?
Noteworthy as Mike Brown is, Chad Trujillo was also on the Palomar team that discovered Eris.
Jun
30
awarded  Popular Question
May
16
revised Which is really larger, Big Dipper or Small Dipper, in 3D
added 1024 characters in body
May
16
answered Which is really larger, Big Dipper or Small Dipper, in 3D
May
14
awarded  Critic
May
14
awarded  Citizen Patrol
Dec
21
comment How bright is the full Earth during the lunar midnight?
Thank you for the detailed calculation. What do these numbers compare to, though?
Dec
4
asked How bright is the full Earth during the lunar midnight?
Dec
4
comment How does the Earth move in the sky as seen from the Moon?
Can you comment on the amplitude of the oscillation? Would it be visible to the naked eye? Would it be detectable by e.g. a sundial (Earth-dial?) during the lunar night?
Nov
18
awarded  Scholar
Nov
18
accepted Why is the Oort cloud presumed to be spherical?
Nov
15
awarded  Nice Question
Nov
14
awarded  Student
Nov
13
asked Why is the Oort cloud presumed to be spherical?
Oct
9
comment How many planets are there in this solar system?
@supercat That is a good question, and I honestly don't know. You should ask it separately!
Oct
9
awarded  Yearling
Sep
24
awarded  Autobiographer