Astronomy and Cosmology FAQ List

[Greg Bernhardt]

PF Insights Blog
https://www.physicsforums.com/insights/postindex/

• Was the early universe in a disordered state?
• Why is the radius of the observable universe in light-years greater than its age?
• Where did the Big Bang happen? Would that be the center of the universe?
• What is the total mass-energy of the universe?
• At what velocity does the universe expand? Can it be faster than light?
• Is the universe a black hole?
• Is the universe finite, or is it infinite?
• Could redshifts be intrinsic rather than cosmological?
• How are time and distance measured in cosmology?
• Can we tell whether the universe is rotating?
• What is the evidence on Big Bang versus steady state cosmologies?
• What is CMB rest?
• What is a trojan asteroid
• What is a photon sphere
• What is mass inflation
• What is Laplace-Runge-Lenz vector
• What is irreducible mass
• What is Binet's Equation
• What is irradiance
• What is critical density
• What is sidereal
• What is the Hawking radiation
• https://www.physicsforums.com/threads/black-hole-thermodynamics.762982/
• What is the Friedmann acceleration equation
• What is frame dragging
• What is orbital eccentricity
• What is the Friedmann Equation
• https://www.physicsforums.com/threads/radius-of-a-black-hole.762981/
• What is synodic
• What are closed timelike curves
• https://www.physicsforums.com/threads/what-is-apoapsis.762977/
• What are Kepler's laws
• Why sunrise gets later in early January, even though the days are getting longer

Feel free to request future FAQs

 

[K. Doc Holiday]

Great list of questions! Makes me want to study more. Also, the greatest discoveries almost always start with a great question. thanks for sharing!

 

[Greg Bernhardt]

Astro/Cosmo FAQ list is back open and updated

 

[crueldeceiver]

Very helpful! Thank you for sharing. :)