Why the Tuesday, June 30 is the longest day of the year? – People’s Daily Online

Spanish & gt; & gt; Science-Technology

UPDATED: 06/30/2015 – 10:18

Keywords: June 30, the longest day, NASA, the sun, moon, Earth

Source:. Agencies

USA, 30 / 06/2015 (The People’s Daily Online) – This Tuesday, June 30 is the longest day of the year 2015 due to the slowdown of the motion of the planet, however, only be a second time.

“The Earth’s rotation is gradually slowing down and called leap seconds are used to adjust,” says Daniel MacMillan, Center Goddard Space Flight NASA.

The Earth . gradually slows down due to a braking force caused by the gravitational struggle between the Earth, Moon and Sun

So this 30 June to reach 23:59:59, the clock will strike 23: 59:60 00:00:00 before giving.

According to experts the world since 1972 has won 15 seconds due to these changes.

href="http://mandrillapp.com/track/click/30522643/api.addthis.com?p=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" target="_blank">