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

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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.