Tech & Science: NASA films Mercury as it passes between Earth and the sun - - PressFrom - United Kingdom
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Tech & Science NASA films Mercury as it passes between Earth and the sun

17:45  12 november  2019
17:45  12 november  2019 Source:   news.sky.com

Asteroid size of Empire State Building to pass Earth Saturday night

Asteroid size of Empire State Building to pass Earth Saturday night NASA's Near-Earth Object Observations Program is monitoring 2000 QW7, but said the asteroid poses no threat to humans.

Stargazers across the world are watching as Mercury moves across the face of the sun - a rare event that happens just 13 or 14 times every 100 years. NASA | Fiery Looping Rain on the Sun - Продолжительность: 4:17 NASA Goddard Recommended for you.

Around 13 times per century, Mercury passes between Earth and the sun in a rare astronomical event known as a planetary transit. The 2016 Mercury transit

a star filled sky: Mercury transitted between the Earth and the sun © Press Release Mercury transitted between the Earth and the sun

NASA has published a film showing Mercury transiting the sun - passing between it and the Earth.

The video shows the silhouetted planet - which is the smallest in the solar system, and the closest to the sun - passing across the face of it.

The last time Mercury passed between the Earth and the sun was on 9 May 2016, and the next won't be until 13 November 2032.

The first time a transit was ever observed was on 7 November 1631, although one of the fathers of modern astronomy Johannes Kepler predicted the existence of these transits before.

Astronomers consider the transits to be important for two special developments in astronomy.

Kepler had predicted that planets orbited the sun in elliptical shapes, rather than perfect circles, running contrary to the previous theories of the solar system - believed to revolve around the Earth.

An image of Mercury captured by NASA's Messenger spacecraft © Press Release An image of Mercury captured by NASA's Messenger spacecraft

"Transits of Mercury and Venus can happen because they are the only planets that orbit between the Earth and the sun," NASA said.

"By using ellipses to describe the orbits of the planets Kepler was able to predict when transits would occur.

"The Ptolemaic theory that used circular orbits did not have the accuracy needed to predict these events, even after epicycles and equants were introduced.

NASA’s InSight robot is fighting against Mars to save a vital instrument

  NASA’s InSight robot is fighting against Mars to save a vital instrument NASA's InSight lander has been resting safely on Mars for nearly a year now, and it's doing some seriously great work. Most of the robot’s suite of sensitive instruments have been working as intended, sending back data and recordings of seismic activity on the dusty planet. However, one of the tools, called the “mole,” has fallen well short of expectations.The instrument is supposed to hammer itself into the surface, pushing itself to a depth of up to 16 feet to gather temperature readings. Unfortunately, the probe has failed to bury itself any deeper than about a foot, but NASA thinks it knows why.

Mercury passes between Earth and the sun only about 13 times a century, its last trek taking place in 2006. Due to its diminutive size, viewing this event safely requires a telescope or high-powered binoculars fitted with solar filters made of specially-coated glass or Mylar. NASA is offering several

This image provided by NASA shows the planet Mercury in silhouette, low center, as it transits across the face of the sun on Monday, Nov. 11, 2019. The solar system's smallest, innermost planet will resemble a tiny black dot Monday as it passes directly between Earth and the sun .

"In 1627, Kepler predicted that a transit of Mercury would occur on November 7 1631. Pierre Gassendi watched from his Paris observatory and saw a small black dot move across the face of the sun on that day."

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From the surface of Mercury, the sun would appear three times larger than it does in the Earth's sky, and the sunlight would be seven times brighter.

However because it has no atmosphere, Mercury does not retain the sun's heat on its dark side - this means that Venus, which has a dense atmosphere, is the hottest planet in our solar system.

Two spacecraft have visited Mercury, the Mariner 10 in 1974 and Messenger, which was launched in 2004

The most colourful images of Mercury were produced by using images from the Messenger spacecraft.

Mars at dawn: This NASA Curiosity rover image will enchant your heart .
The Curiosity rover gifted us with a gorgeous look at a new day dawning far, far away.Mars is barren and dry. Earth is luxuriating in water. Sometimes these two very different planets find common ground under the light of the same sun. NASA's Curiosity rover just captured one of those moments in a stirring new image showing dawn breaking across Gale Crater.

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