Some facts about earth day

 Some facts about earth day

Our lovely and fragile home. Click to engaiaenate.
Image credit: ESA ©2009 MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA

 

Earth is the planet where we live, where we are born, and the place where we are starting now.

God created the heavens, the Earth, the solar system, and the universe is to humans. But what has been done to the EARTH or to God?

Today, Apr. 22, is earth day, a time to cherish our planet and two way our relationship with it. It's easy to take the Earth for granted, because we see it every day. It became part of the background of life.

But when you look at the world through the eyes of science, no. We live on the surface of large rock giant space-borne water-laden spin this, separated from the rest of the universe under the thin veil of molecular nitrogen and oxygen. Even though you're immersed in its influence, what do you really know about the Earth?

Here are some Earth Day facts about our planet for you to ponder these days. All 23 hours and 4,091 seconds from it, it is.

Earth's water collected into a single drop. Image credit: Jack Cook/WHOI/USGS

1) there are many different ways to measure how long it takes the Earth to go around the Sun, but if you say it takes a pi x 10 million seconds, only a half percent.

2) Earth has a volume of about one trillion cubic kilometres. Can you imagine a cube of 1000 meters high, 1000 meters, 1000 meters? Now picture a gazillion. That's the Earth.

 

3) Earth is not a perfect sphere. It spins, so flat on the pole a little bit. The Diameter of the through Poland 12, 713.6 km (7882.4 MI), but 12, 756.2 kilometers (7908.8 miles) through the equator. The difference 43 kilometres which is just about 0.2 per cent, though, so really we are pretty close to the perfect ball.

The Earth, a pale blue dot, seen from over 6 billion km away by the Voyager 1 spacecraft. From that distance, it was far less than a single pixel wide. Image credit: NASA/JPL

4) Earth has a mass of about 6,000, 000, 000, 000, 000, 000, 000, 000 kilograms, or, if you like, also 6 tons. In the pound, it was a really ...0. nothing. Mass is a measure of how many goods that contain objects, but the weight is how hard the gravitational pull on the mass. The Earth is in space, orbiting the Sun, so in freefall. It has mass, but not heavy at all.

 

5) not only that, but the gravitational forces of the Sun and moon (what we call) distort its shape even more, interesting bulge out of it. The Earth is thick! Out at sea, a bulge of water because the Sun and the moon can have an amplitude (high change from minimum to maximum) meters (40 inches). Solid Earth deforms due to tide, too, with an amplitude of approximately 50 cm (20 inches). Even the air is influenced by the waves; Although there are some very complex factors (such as expansion due to Heating from the Sun during the day, and, simply, the weather).

6) there is a physical place where the Earth's atmosphere and space begins; the air will only thin and thin and eventually disappeared. But we love the official definition, so the height above the Earth's surface is thought to be where space begins — called the Kármán line lies at an elevation of — 100 km. anyone who gets higher than those considered to be an astronaut.

The Moon is so small in the sky it's actually difficult to photograph without a good telephoto lens. Image credit: Phil Plait

7) Month radius is approximately 1/4 of the Earth, making it the largest satellite than the planet's parent. Charon, Pluto's largest moon, is about half the diameter of Pluto itself. So if you do not consider Pluto a planet, the Earth and the moon.

8) this transparent Atmosphere) to a narrow slice of the electromagnetic spectrum. What we call visible light (mostly!) will go through, but most of the infrared, ultraviolet, x-rays and gamma rays stop cold. Some of the last person to endanger life, as we know, so it works well. But it's not a coincidence: If our air didn't protect us, we will have evolved different!

9) the Moon is farther from the Earth than you think. As an analogy, if the Earth were basketball, the moon will be the size of a tennis ball 7.3 metres (24 ft).

 

10) the Earth is warming. It is a fact. Dealing with it.

11) less than 220 impact craters have been Catalogued in the Earth. The moon has billions. We will have just as much, but our air and water erode them from time to time, delete them. Old craters on Earth is hundreds of millions of years; on the Moon they would be considered young.

The Manicouagan impact crater in Canada, seen from space. Image credit: NASA

12) Earth orbit the Sun in an ellipse. The shape changes little over time due to the influence of other planets, but on average the closest we get to the Sun (perihelion) is about 147.1 million kilometers (miles 91.3 million) and longest (aphelion) around 152.1 million kilometers (94.3 million km). The difference is that only about 3 percent, which the eye is very nearly a perfect circle.

 

13) An asteroids, 2010 TK7, sharing an orbit with the Earth. It is about 300 meters (1,000 feet) across, and never got close enough for us to be a hazard.

 

14) If you take all the water on Earth and collected into a drop, it will be just less than 1,400 kilometers (860 miles) across.

15) Earth's atmosphere weighs 5 trillion pounds, or trillions of 5000 tons! You can do the math yourself: weight equals pressure times area. Atmospheric pressure on the surface of the Earth is about 1 kilogram per square centimetre. Multiply that by the number of centimetres square on the surface of the Earth and you get the weight of all that air. Hint: The ball is 4 x π x radius2. [Note: Yes, I know the mass and weight of a kilogram. Read this before you rant in the comments, please.]

And a bonus, because it is important:

16) the Earth is the only place in the universe where we know that there is life. But that won't be true forever.

For us, our Earth seems big, solid, made especially for us, and permanent. But that's just one perspective, are born to live on its surface. From a different perspective, none of those things is true. Seen from space, it looks far more could be solved. Views of deep space shrinks to nothing more than a point, was barely visible in the reflected light of the Sun. Of the others, even see the planet at all would be a colossal task. We are, after a monumental effort includes decades, only now discovered another planet orbiting another star.

Nothing like Earth? Almost certainly, and might not even be billions of planets like ours orbiting alien stars. But while they are like us, they are not ours. Like every individual, our world is unique and precious, and beautiful. Let's keep it that way.

 

Page Source: 

http://www.slate.com/blogs/bad_astronomy/