945 reputation
115
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location Santa Ana, CA
age 54
visits member for 5 months
seen 1 hour ago

1d
reviewed No Action Needed Thought experiment about the outskirts of the universe
1d
reviewed No Action Needed Why aren't the farthest objects close to each other?
1d
reviewed No Action Needed How do black holes evaporate?
2d
answered Fate of the Spiral Arms of the Milky Way and Andromeda
Aug
30
reviewed No Action Needed What is the relative time difference between us and a star system in outer layer of our galaxy?
Aug
30
reviewed Close How to calculate right ascension of Greenwich?
Aug
30
reviewed Close Going from the second moments of an object to its ellipticities and half-light-radius
Aug
23
reviewed No Action Needed Will an observer falling into a black hole be able to witness any future events in the universe outside the black hole?
Aug
22
reviewed Leave Closed Why don't planets give off their own light?
Aug
22
reviewed No Action Needed Why do (most of) the planets rotate counterclockwise, i.e. the same way the Sun does?
Aug
21
reviewed No Action Needed Multiple apparent lunar eclipses last night
Aug
20
reviewed Close What type of energy is escaping from black-hole's poles?
Aug
20
comment Why aren't there galaxy-sized balls of iron out there?
@HDE226868 I knew that. I just didn't want to take the time to look up the correct amounts.
Aug
19
reviewed No Action Needed How was an infrared picture of the entire universe taken?
Aug
19
answered Why aren't there galaxy-sized balls of iron out there?
Aug
17
comment Original Hubble diagram units incorrect?
The paper indicates that it should be km/s. Maybe the creator of the graph was not awake when it was made.
Aug
15
reviewed Leave Open Infinite universe? How?
Aug
15
reviewed No Action Needed What is star composition after formation
Aug
15
reviewed No Action Needed Infinite universe? How?
Aug
15
reviewed Reviewed Starting out in practical astronomy