Skip to main content

New answers tagged

3 votes

How can $\Omega_m<1$ indicate an infinitely expanding universe?

I studied that if $\Omega=\frac{\rho}{\rho_c}$, which is the sum of the three is greater than one, the universe eventually collapses, if exactly one, its flat and if less than 1, it keeps expanding. ...
Sten's user avatar
  • 4,694
0 votes

How can $\Omega_m<1$ indicate an infinitely expanding universe?

Dark Energy isn't a type of pushing anti-gravity. All matter and energy contribute to the curvature of spacetime and if there were "more" dark energy then the total density of the universe ...
James K's user avatar
  • 123k
8 votes
Accepted

White dwarf supernova luminosity

Type Ia supernovae are not standard candles in the sense that all such supernovae have the same luminosity. This is also the case for other standard candles such as Cepheids. What we can say, is that ...
ProfRob's user avatar
  • 153k
3 votes

White dwarf supernova luminosity

Yes. It does mean that. Double degenerate type 1a supernova would create supernovae of significantly different luminosity, and hence, in the words of Wikipedia, "raise questions about the ...
James K's user avatar
  • 123k

Top 50 recent answers are included