Random Science Facts Thread!

[Nightside]

On 8/20/2020 at 8:52 AM, AllenLi said:

1. If we ignored the theory of relativity, and the lump of the earth in the equator, then...

All LEO sats can move meters away from originally calculated trajectory, on a daily basis.

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Or how do you think SSO sats work?

2. There are only 13 countries worldwide, capable of sending a sat to orbit without external assistance. USSR will not be treated as Russia.

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In time sequence:

USSR, 1957, Oct

USA, 1958, Jan

France, 1965, Nov

Japan, 1970, Feb

China, 1970, Apr

UK, 1971, Oct

India, 1980, Jul

Israel, 1988, Sep

Russia, 1992

Ukraine, 1992

Iran, 2009

North Korea, 2012

South Korea, 2013

Some of the latter ones may not be agreed by some people. This is for reference, and what a majority agrees.

 

Should UK be on that list still?