Skip to main content
Astronomy
John Duffield's user avatar
John Duffield's user avatar
John Duffield's user avatar
John Duffield
  • Member for 8 years, 10 months
  • Last seen more than a month ago
Profile Activity

57 Answers

Score Activity Newest
85 votes
Accepted

Does the Milky Way move through space?

11 votes

Is there a maximum size for a black hole?

9 votes

So where are these measurements of galaxies moving faster than light?

7 votes

Detecting habitable planets

7 votes
Accepted

A camera and time dilation?

6 votes

On the cosmological principle

4 votes

What is the future of our universe?

3 votes

Why do black holes choke?

3 votes

Black Hole growth

3 votes

Why black holes are extremely cold?

3 votes
Accepted

How wary should I be of old cosmology books?

3 votes

is this really true that speed of light is same as we look from different parts of universe?

3 votes

How precise are the observational measurements for the speed of gravity?

3 votes
Accepted

Will a black hole swallow the universe?

3 votes

Is space a thing?

3 votes
Accepted

Anti matter in Jupiter magnetic field?

2 votes

Singularities/ringularities and their properties

2 votes
Accepted

How is information preserved on the surface of a Black Hole?

2 votes
Accepted

Does the mass of a collapsing star change?

2 votes
Accepted

Is there a way to know how the magnetic field was at the very beginning of our universe?

2 votes

Could the expansion of universe be a side effect of gravity?

2 votes

Canvas and bowling ball

2 votes

Question about space-time

1 vote

Center of the universe

1 vote
Accepted

What is the Maximum Speed that can be acheived Because of Acceleration Due to Gravity?

1 vote

Could Dark Energy be a "Cosmic Gravity Background"

1 vote

Newtons law of Gravitation

1 vote

Universe and black holes

1 vote

How do we know how fast the surface of a neutron star is rotating?

1 vote

How do we have photos of galaxies so far away?

1
2