Observational Cosmology
The study of the origin, evolution, and structure of our Universe.

Research methods in observational cosmology:

Gravitational lensing
Short description of gravitational lensing and cosmology.

21cm intensity mapping
Trace HI structure in the Universe to measure matter power spectrum and baryon acoustic oscillations

Galaxy & Quasar Clustering
Standard ruler and growth of structures

Lyman-Alpha Forest
Probing the intergalactic medium

Spectroscopic Surveys
Probing the 3D map of galaxies and quasars in the Universe

Cosmological Simulations
Synthetic universes that mimic the observed large-scale structures

Extragalactic Distance Scale
Measuring distances and the Hubble constant using standard candles