Astronomy & space · self-study course
Astrophysics, cosmology and inference
Study galaxy models, cosmic expansion, black holes and uncertainty in astronomical measurements.
4 lessons32 quiz questionsAdvanced university
Your learning path
- 01
Galaxies, dynamics and dark-matter evidence
Galaxies contain stars, gas, dust and other gravitating components. Their morphology does not alone determine all their dynamical properties.
Advanced university · Notes · 8 questions - 02
Redshift, expansion and cosmological distances
Define z=(λobserved−λemitted)/λemitted. Redshift is dimensionless and can arise through different physical mechanisms.
Advanced university · Notes · 8 questions - 03
Black holes, horizons and observable environments
For a nonrotating uncharged black hole, the horizon radius is rs=2GM/c². Rotation and charge require a different spacetime description.
Advanced university · Notes · 8 questions - 04
Astronomical inference, selection and multi-messenger data
A detected sample is shaped by observing limits and selection criteria. It need not represent the full source population without correction.
Advanced university · Notes · 8 questions