Astronomy compels the soul to look upwards and leads us from the world to another.

by Salman Khan


by Charles Bailyn


by Alan Guth





by UC Irvine

"Cook's Tour" of the universe. Ancient world models. Evidence for universal expansion; the size and age of the universe and how it all began. The long-range future and how to decide the right model. Anthropic principle.

Flight and Orbital Mechanics

by TU Delft

The following topics are covered: 1. Turning performance (three dimensional equations of motion, coordinate systems, Euler angles, transformation matrices) 2. Airfield performance (take-off and landing) 3. Unsteady climb and descent (including minimum time to climb problem) 4. Cruise flight and transport performance 5. Equations of motion with a wind gradient present 6. Equations of motion applied to various phases of space flight 7. Launch, Vertical flight, delta-V budget, burn out height, staging 8. Gravity perturbations to satellite orbits, J2 effect for low earth orbit satellites, J2,2 effect for Geostationary Earth Orbit satelites leading to contribution in V budget 9. Patched conics approach for interplanetary flight, gravity assist effect / options for change of excess velocity (2d, 3d), Launch, in orbit insertion

The Early Universe

by MIT

The Early Universe provides an introduction to modern cosmology. The first part of the course deals with the classical cosmology, and later part with modern particle physics and its recent impact on cosmology.

Astronomy Lectures

by Gresham College

The lectures of Professor Carolin Crawford about astronomy-space-planets and much more, delivered in her role as Gresham Professor of Astronomy.

Exploring Black Holes

by MIT

Study of physical effects in the vicinity of a black hole as a basis for understanding general relativity, astrophysics, and elements of cosmology. Extension to current developments in theory and observation. Energy and momentum in flat spacetime; the metric; curvature of spacetime near rotating and nonrotating centers of attraction; trajectories and orbits of particles and light; elementary models of the Cosmos. Weekly meetings include an evening seminar and recitation. The last third of the semester is reserved for collaborative research projects on topics such as the Global Positioning System, solar system tests of relativity, descending into a black hole, gravitational lensing, gravitational waves, Gravity Probe B, and more advanced models of the Cosmos.

Frontiers and Controversies in Astrophysics

by Yale

This course focuses on three particularly interesting areas of astronomy that are advancing very rapidly: Extra-Solar Planets, Black Holes, and Dark Energy. Particular attention is paid to current projects that promise to improve our understanding significantly over the next few years. The course explores not just what is known, but what is currently not known, and how astronomers are going about trying to find out.

Astrobiology and Space Exploration

by Stanford

Astrobiology is a new meta-discipline which combines astronomy, biology, chemistry, philosophy, and physics in an effort to study the current state of life in the universe.In the Stanford Astrobiology Course, lectures follow a, more or less, linear path from the Big Bang all the way to the development of complex life and, finally, space exploration. The course explains how evolutionary principles have operated at the macro, and micro, level ever since the birth of the universe we reside in today.

Cosmology and Astronomy

by Khan Academy

Videos attempting to grasp a little bit about our Universe.