Stack Exchange

Jim

Toronto, Canada, eh?

http://arXiv.org

I'm a cosmologist. I did my undergraduate in space engineering (rocket science) and my graduate degree in cosmology. I enjoy Dark Energy, curvature, and modified gravity, but I mainly focus on inflation.

top accounts reputation activity bookmarks subscriptions
Top Questions
Top Answers
80
What technology can result from such expensive experiment as undertaken in CERN?
physics.stackexchange.com

72
Why are some people are claiming that the Big Bang never happened?
physics.stackexchange.com

71
Why does a bowling ball roll down faster on a slope than a tennis ball, yet both hits the ground at the same time if they're dropped from the rooftop?
physics.stackexchange.com

69
Is gravity just electromagnetic attraction?
physics.stackexchange.com

57
Why is the sky never green? It can be blue or orange, and green is in between!
physics.stackexchange.com

56
Why can Hiroshima be inhabited when Chernobyl cannot?
physics.stackexchange.com

52
How fast would someone have to run to travel vertically up a wall?
physics.stackexchange.com

43
Cooling a satellite
physics.stackexchange.com

40
Build a ring around Earth, then remove the supports
physics.stackexchange.com

37
Can a human size object move so fast that it ceases to be observable?
physics.stackexchange.com

36
Shine a beam of light horizontally, drop a stone from same height - would both hit the ground at the same time?
physics.stackexchange.com

28
What if photons are not the fastest particles?
physics.stackexchange.com

25
Why do we need to know the shape of the slide to find the time to slide down it?
physics.stackexchange.com

25
Minkowski Metric Signature
physics.stackexchange.com

25
Contradiction between law of conservation of energy and law of conservation of momentum?
physics.stackexchange.com

24
Can a mouse rotating a wheel violate conservation of angular momentum?
physics.stackexchange.com

22
Does General Relativity imply loops in space?
physics.stackexchange.com

22
Why is jumping into water from high altitude fatal?
physics.stackexchange.com

20
Three polarizers, 45° apart
physics.stackexchange.com

19
Can an object falling in vacuum generate electricity by itself?
physics.stackexchange.com

18
Is the Big Bang defined as before or after Inflation?
physics.stackexchange.com

18
Rocky Planet in the center of System
physics.stackexchange.com

18
What is the evidence for a supermassive black hole at the center of Milky Way?
physics.stackexchange.com

17
Direction of angular velocity
physics.stackexchange.com

16
How would wormhole-based FTL violate causality?
physics.stackexchange.com

15
How many more galaxies are out there in the Universe (beyond the observable radius)?
physics.stackexchange.com

15
Why is the sky dark at night?
physics.stackexchange.com

15
What did recombination look like?
physics.stackexchange.com

15
If two particles are entangled and you collapse the wave function of one of the particles. Does the other particle collapse as well?
physics.stackexchange.com

14
Why don't we see solar and lunar eclipses often?
physics.stackexchange.com

1 2 3 4