The Search for Earth-like Planets 3

[alaudun2]

Great video but since Kepler parts of it have become oblsolete so it needs to be updated.

[UnGatoExtraviado]

i love watching this when im high

[poodtang1]

DrChiMED: Vegetation produces oxygen. On other planets mayby some other lifeform performs the task of producing oxygen for the planet. Perhaps something that resembles gelatin ( jello ).

Mayby their mountains are covered with a gelatin like substance.

[baley7]

wonderful video thanks for sharing

[poodtang1]

baley7: I've always wondered why do exo-vegetation have to be green. Can vegetation be some other colour ?

[salbrismind]

Well on Earth they are green because of chemicals in plants used photosynthesis. But I would say it would be foolish to only look for green plants on other planets since they didn't evolve on Earth and would likely not use the same chemicals as our plants.

[DrChiMED]

Poodtang1, yes they can be! The plants don't have to be green that is just what they are on Earth because they absorb primarily the red light and reflect the blue light & yellow light specras. You can have plants, perhaps on other planets which would absorb more complete spectra and appear visually black, or absorb more blue light spectra and appear orange in color. There are several ways of developing a phytochemical basis of photosynthesis that will use different spectral wavelengths

[MookyManster]

i wonder if ALLLLLLL planets in the whole universe are sphere

[salbrismind]

Technically, the Earth isn't a perfect sphere, it is a bit wider at the equator and thinner at the poles due to centripetal force. But yes all planets will be rounded, because it's how they all form, like a burn mass that cools on the edge (the crust) and gravity pulls all around the planet roughly equal causing it to be the smallest surface area for its mass.

[kidclumsy]

Bla bla bla  you keep pumping out the best anit creationist propaganda ever