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Are moons the most likely place to find life beyond the Earth? Explore the 300 that lie within our solar system which might give an idea of the Earth's turbulent past.
S1E6 • How the Universe Works • 2010 • Astronomy
* Gravity is a Force * Different Types of Orbit * Escape Velocity * Weightless Mass
#7 • Crash Course Astronomy • Astronomy
Jupiter is the biggest planet in our solar system. The gas giant is NOT a failed star, but a really successful planet! It has a dynamic atmosphere with belts and zones, as well as an enormous red spot that’s actually a persistent hurricane. Jupiter is still warm from its formation, and has an interior that’s mostly metallic hydrogen, and it may not even have a core.
16 • Crash Course Astronomy • Astronomy
The story is told in a documentary way, looking at the present day. The future mission is filmed as a movie. In this episode scenes are changing in these timeframes.
Thanks to the wonders of physics, astronomers can map a timeline of the universe’s history. Today, Phil’s going to give you an overview of those first few minutes (yes, MINUTES) of the universe’s life. It started with a Big Bang, when the Universe was incredibly dense and hot. It expanded and cooled, going through multiple stages where different kinds of matter could form. It underwent a phenomenally rapid expansion called inflation, which smoothed out much of the lumpiness in the matter. Normal matter formed atoms between 3 and 20 minutes after the bang, and the lumps left over from inflation formed the galaxies and larger structures we see today.
44 • Crash Course Astronomy • 2016 • Astronomy
Today Phil’s explaining the stars and how they can be categorized using their spectra. Together with their distance, this provides a wealth of information about them including their luminosity, size, and temperature. The HR diagram plots stars’ luminosity versus temperature, and most stars fall along the main sequence, where they live most of their lives.
26 • Crash Course Astronomy • 2015 • Astronomy