Lectures related to Friedmann equations

The Universe: Describing Size, Mass-Energy, Geometry, and Evolution

Explores the Universe's size, mass-energy, geometry, and evolution, including redshift effects and accelerating expansion.

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Expansion and Hubble Law

Explores the expansion and Hubble law in astrophysics, covering the Hubble constant, cosmological redshift, critical density, and cosmic background radiation.

Stellar Orbits in Axisymmetric Potentials

Explores the dynamics of stellar orbits in axisymmetric potentials, focusing on nearly circular orbits and different types of motion.

Gravity Waves and Instabilities

Covers perturbation theory, compressible fluids, sound waves, instabilities, energy equations, and gravity waves.

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The Matter Content in the Universe

Explores the matter content in the universe, including galaxy mass, dark matter relics, and the history of the universe.

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