Video Clips

Here you can watch video lectures on astronomy topics. Watch one of 29 individual playlists, or use the Wikimap to find similar topics.

Switch to wikimap view

Articles related to: Life on Jupiter  Read article

1. Atmosphere of Saturn  Read article

Saturn has similar atmospheric composition and structure to Jupiter. As on Jupiter, scientists refer to different regions and morphologies in the atmosphere. There are the bright zones, white or yellowish in coloration, and the darker belts which are grayer, brown, or even reddish. These colors a...

2. Life on Giant Planets  Read article

It’s particularly important to consider the possibility of life on or in the gas giant planets of the solar system because these are the type of planets that have been found around nearby stars. Over a hundred extrasolar planets are now known, and most of them are Jupiter-like or larger, although t...

3. Early Greek Ideas  Read article

The early Greek philosophers had none of the tools of modern science.  They did not have the machines with which to probe the atom.  They did not have telescopes. They didn't have modern technology of any kind, and yet with logic and mathematics they were able to make some striking speculations and...

4. Life on Europa  Read article

What exists under the ice pack on Europa in its liquid oceans? Nobody knows for sure. In his novel 2010 Arthur C. Clark speculated about the possibility of primitive life forms in Europa’s oceans. Scientists do not know if this is possible, but Earth's history is intriguing because on Earth life ...

5. Computers and Evolution  Read article

Computers have informed us about evolution in two fundamental ways. First, the power of computers has been used to model evolution. It’s possible to create life in a computer in a sense. So-called genetic algorithms can be used to mimic the processes by which life may have begun on Earth. This i...

6. Internal Heat of Jupiter  Read article

In the 1960s scientists were surprised to find that Jupiter emits twice as much infrared radiation as it receives from the Sun. We see Jupiter in the reflected light of the Sun, and since no planet is a perfect reflector, like a mirror, we must receive less visible radiation from a planet then is r...

7. Plurality of Worlds  Read article

The Copernican revolution and the invention of the telescope opened up people’s ways of thinking about the universe. The universe now became a very large place in the heliocentric model because the stars must be very far away compared to the distance between the Earth and the sun. In addition, Gal...

8. Induction and Life  Read article

Scientists tend to think in traditional and anthropocentric ways about the possibilities of life in the universe. The Drake equation is a deductive framework, the multiplication sequentially of several probabilities. It works in terms of the possibility of Sun-like stars and Earth-like planets aro...

9. Interior of Saturn  Read article

The interior of Saturn is almost certainly very similar to the interior of Jupiter, grading down from a pure simple gas in the outer atmosphere region towards molecular gas lower down, when the temperature is still cold but the pressure is high, towards metallic hydrogen at a point where the pressur...

10. Extreme Habitable Zone  Read article

The traditionally defined habitable zone, the distance from the Sun within which liquid water can exist, extends from 0.8 to 1.7 AU. This range encompasses the Earth and Mars only within the solar system. However, our knowledge of the extreme possibilities of life surviving on Earth, extremophiles...