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Mercury transit 2019 : Where and How to see it Today | NASA


Mercury transit 2019 : Where and How to see it Today!

The 2019 Mercury transit has ended; read our full story about the event here. 

Today, people across most of the world can catch the planet Mercury passing across the sun. This rare event won't be seen from Earth again until 2032, so we put together this guide on the science behind the sight and how best to observe it yourself. 
The smallest planet in the solar system is also the closest to our star, and occasionally it crosses in front of the sun's bright disk from our perspective here on the Earth. The last time this happened it was in 2016, but after this upcoming transit, we'll have to wait another 13 year to see the next one.

The smallest planet in the solar system
The smallest planet in the solar system

Mercury begin its journey across the sun at 7:35 a.m. EST (1235 GMT), and the entire transit will take roughly five and a half hour, ending at 1:04 p.m. EST (1804 GMT), according to NASA.
The planet currently looks like a tiny, travelling blemish on the sun's face as it passes in the front of the sun. The transmitting world will be so small that skywatches will need special gears-telescopes or binoculars equipped with protective solar filters -to see it.

Mercury's transit explained
Mercury and Venus are the only planets that can pass in front of, transit, the sun as seen from Earth, because their orbits are between the sun and Earth's orbit. Mercury's average distance from the sun is 35,93,095 miles (57,909,175 kilometre), aur about 30% of the average distance between the Earth and the sun.
Mercury and Venus
Mercury and Venus

Transits are real events.from earth, Mercury can be seen moving across the sun's face about 30 times every hundred years, on average. For a transit to occur, mercury's got to be in the right place at the right time. 
Let's use breakfast to illustrate. Picture the solar system as a cosmic fried egg. The sun is the yolk, and the planets orbit it within the flat plane of the egg white.
Mercury and Earth move in orbit slightly titled to one another, so if these orbits were drawn out in 3D within the egg white, and if you were to look toward the middle of this egg from the side, there would be two point at which mercury is orbit and Earth's orbit would appear to overlap.

Currently, these point Occur in early may and early November; that's the window of the time when Mercury transits could be visible from the Earth. People on earth don't see a Mercury transit every year, however, because each planet takes different length of time to orbit sun, so Mercury and Earth don't always go inside at those places where the orbits overlap called nodes, at the same time.

Video Source : McGraw-Hill PreK-12

The 2019 Transit of Mercury for Kids

There are four key-part to the entire event, beginning with the first contact, all the movement mercury's silhouette first touches the edge of the sun, Dean Pesnell, project scientist from NASA's solar dynamic observatory (SDO), said in an October 23 blog post. Another way to describe it is to say, " when the planets disk is externally tangent to the sun," according to the astrophysicist Fred Espenak, aka "Mr. Eclipse," who runs the sky watching website eclipsewise.com.

Second contact occurs atthe instant that Mercury appears to have moved completely in front of the sun, Pesnell wrote. Third contact is when Mercury begins to cross over the age of the sun's disk near the end of the transit, and fourth contact is the last moment mercury's Shadow touches the age of the solar disk, marking the end of the transit.

What happen during a transit?
What happen during a transit?

  • Where to see it

Mercury's transit
Mercury's transit

Mercury's transit will be visible from most of North America; all of South America; all of Africa; and parts of Europe, Asia and Antarctica. According to a map developed by time and date, sky-gazers in cities like New York, Montreal and Sao Paulo will be able to see the entire transit, and people of Honolulu, ROM and cairo can catch part of Mercury's trip.
Viewers on the US East coast can watch the entire transit, because the sun will already have risen by the time the event begins. certain midwesterners, like those viewing from Columbus, ohio, can also catch the tiny silhouette of Mercury entering and living the sun's disk. But skywatchers west of the Mississippi River will miss part of the event, because the transit will already be underway by the time of Sun rises there. There will be plenty of time to enjoy it, however, because the event will last for 5 hours, 28 minutes, 47 seconds according to the time and date. for example folks in San francisco, California have over 3 hours of viewing time after sunrise.

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