Stuff I always wondered about astrophysics

  • Thread starter Thread starter FayeKane
  • Start date Start date
  • Tags Tags
    Astrophysics
AI Thread Summary
Stellar ignition occurs over a much longer timescale than seconds, often taking tens of thousands of years for photons to escape a star's core. Neutron stars do not support fusion; they emit detectable radiation through mechanisms like blackbody radiation and synchrotron radiation from their magnetic fields. Supernovae result from different mechanisms than novae, with the former involving the complete destruction of a star, while the latter typically involves mass accumulation on a white dwarf. The light curve of a supernova rises rapidly as material collapses at relativistic speeds, and the core can reach neutron star densities before rebounding. Observational astronomy faces challenges in studying faint objects, suggesting a need for dedicated instruments to explore local galaxies and their dynamics.
  • #51
36 -- Why "black hole's temperature gets higher with less 'mass'"?
 
Astronomy news on Phys.org
  • #52
twofish-quant said:
But there is a difference from *suggesting* that redshifts are non-cosmological and *insisting* that redshifts are non-cosmological.
I am not suggesting throwing out the baby with the bath-water. The Hubble flow relationship is on solid ground. There is evidence that in addition to the Hubble relationship and Doppler effects arising from peculiar motion, there is at least one other contributor to the redshifts of celestial bodies. It's not an Earth-shattering concept, but one that encounters a great deal of resistance from some quarters.
 

Similar threads

Back
Top