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3 votes

1 answer

832 views

How is the Redshift of Recombination Calculated?

asked Apr 30, 2020 at 21:34

3 votes

2 answers

378 views

I need help computing the effect of curvature on the FRW metric

asked May 8, 2020 at 13:51

3 votes

2 answers

312 views

How is the first Friedmann equation derived from Einstein's field equations?

asked Jul 6, 2020 at 19:43

3 votes

4 answers

545 views

How is the curvature term of the Friedmann Equation calculated with the Newtonian derivation?

asked Jul 10, 2020 at 15:16

3 votes

1 answer

201 views

What is the sum of forces equation in curved spacetime?

asked Jan 17, 2021 at 19:23

3 votes

2 answers

312 views

In Cosmology, what does it mean to be 'local'?

asked Jan 22, 2021 at 22:48

3 votes

1 answer

143 views

Why is Big Bang Nucleosynthesis favored over Stellar Nucleosynthesis?

asked Mar 29, 2021 at 20:20

2 votes

1 answer

97 views

Can someone please explain how Dodelson derives his formula for the neutron to proton ratio during BBN?

asked Mar 27, 2021 at 22:20

2 votes

1 answer

203 views

Is there still an anomalous precession in Mercury's orbit that GR doesn't predict?

asked Feb 17, 2021 at 20:19

2 votes

3 answers

254 views

Is there a motion picture of sub-atomic particle collisions?

asked Apr 13, 2021 at 0:31

1 vote

1 answer

50 views

Where can I find the latest Cosmological Parameters derived from SNe Ia magnitudes?

asked Aug 15, 2021 at 18:19

1 vote

2 answers

107 views

Does pressure alter nuclear reaction rates?

asked Jan 6, 2022 at 13:58

1 vote

1 answer

79 views

How does Dodelson calculate the number density of a particle species?

asked Mar 18, 2021 at 0:20

1 vote

2 answers

399 views

How is spacetime locally Lorentzian?

asked Jan 23, 2021 at 18:51

1 vote

2 answers

184 views

How do you derive Newtonian Sum of Forces equation from GR?

asked Jan 30, 2021 at 15:28

1 vote

1 answer

1k views

What is the relationship between Cosmic Time and Scale Factor (or Redshift)?

asked Apr 27, 2020 at 20:36

1 vote

1 answer

280 views

What is the luminosity of the Milky Way?

asked Apr 25, 2020 at 13:57

1 vote

1 answer

108 views

A question about conformal time

asked Apr 26, 2020 at 0:48

1 vote

2 answers

532 views

What are the accepted abbreviations for Million Years and Billion Years?

asked May 21, 2020 at 13:21

0 votes

1 answer

696 views

What is the proton to neutron ratio at freeze-out?

asked Jun 8, 2020 at 21:48

0 votes

0 answers

48 views

What is the (model independent) density of baryons in the Universe?

asked Jun 10, 2020 at 11:35

0 votes

0 answers

82 views

Why is the density of atoms in space so much higher than the baryon density from BBN and CMB?

asked Jun 13, 2020 at 18:40

0 votes

1 answer

374 views

How do you calculate curvature from the density?

asked Jun 20, 2020 at 1:10

0 votes

1 answer

58 views

What is the name of the constant in this formula for photon density?

asked Jun 24, 2020 at 21:14

0 votes

2 answers

165 views

How would you label an axis that is Log base 10 in Gyr?

asked Jun 30, 2020 at 19:38

0 votes

0 answers

26 views

How isotropic is the universe?

asked Jun 30, 2020 at 20:48

0 votes

1 answer

20 views

Does the $M/L$ ratio have an implied band?

asked Apr 26, 2020 at 19:26

0 votes

1 answer

67 views

In Luminous Distance calculations, why does the power fall of by a factor of $(1+z)$?

asked Apr 11, 2020 at 17:33

0 votes

1 answer

57 views

What is a good database of galaxy luminosities?

asked Apr 25, 2020 at 1:18

0 votes

0 answers

88 views

What is the difference between Hubble Function and Hubble Parameter?

asked Apr 29, 2020 at 14:24

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45 Questions

How is the Redshift of Recombination Calculated?

I need help computing the effect of curvature on the FRW metric

How is the first Friedmann equation derived from Einstein's field equations?

How is the curvature term of the Friedmann Equation calculated with the Newtonian derivation?

What is the sum of forces equation in curved spacetime?

In Cosmology, what does it mean to be 'local'?

Why is Big Bang Nucleosynthesis favored over Stellar Nucleosynthesis?

Can someone please explain how Dodelson derives his formula for the neutron to proton ratio during BBN?

Is there still an anomalous precession in Mercury's orbit that GR doesn't predict?

Is there a motion picture of sub-atomic particle collisions?

Where can I find the latest Cosmological Parameters derived from SNe Ia magnitudes?

Does pressure alter nuclear reaction rates?

How does Dodelson calculate the number density of a particle species?

How is spacetime locally Lorentzian?

How do you derive Newtonian Sum of Forces equation from GR?

What is the relationship between Cosmic Time and Scale Factor (or Redshift)?

What is the luminosity of the Milky Way?

A question about conformal time

What are the accepted abbreviations for Million Years and Billion Years?

What is the proton to neutron ratio at freeze-out?

What is the (model independent) density of baryons in the Universe?

Why is the density of atoms in space so much higher than the baryon density from BBN and CMB?

How do you calculate curvature from the density?

What is the name of the constant in this formula for photon density?

How would you label an axis that is Log base 10 in Gyr?

How isotropic is the universe?

Does the $M/L$ ratio have an implied band?

In Luminous Distance calculations, why does the power fall of by a factor of $(1+z)$?

What is a good database of galaxy luminosities?

What is the difference between Hubble Function and Hubble Parameter?