Introduction of space.docx

7/28/2019 Introduction of space.docx

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Introduction of space

Family OfThe Sun"The Planets of Our Solar System in Song

The Family of the Sun,Its planets number eight,

Plus other rocky, icy worlds

That we appreciate.

Mercury is hot

and Mercury is small.Mercury has no atmosphere;

It's just a rocky ball.

The Family of the Sun,

Its planets number eight,

Plus other rocky, icy worldsThat we appreciate.

Venus has thick cloudsThat hide what is below.

The air is foul, the ground is hot.

It rotates very "slow."

We love the Earth, our home,

Its oceans and its trees.We eat its food. We breathe its air,

So no pollution, please.

Mars is very red.It's also dry and cold.

Some day you might visit Mars

If you are really bold.

Great Jupiter is big.

We've studied it a lot.

We found that is has many moonsand a big red spot.

Saturn has great rings.

We wondered what they were,

Now we know they're rocks and ice

which we saw as a blur.

With atmospheres that swirl& wispy white clouds tooUranus and Neptune

are so cold that you'd turn blue.

Pluto's small and cold

It has an icy face.

We call it a dwarf planet now,But it's still quite a place.


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From our small world we have gazed upon the cosmic ocean for untold thousands of years.

Ancient astronomers observed points of light that appeared to move among the stars. They called

these objects planets, meaning wanderers, and named them after Roman deities --Jupiter, king ofthe gods; Mars, the god of war; Mercury, messenger of the gods; Venus, the god of love and

beauty, and Saturn, father of Jupiter and god of agriculture. The stargazers also observed comets

with sparkling tails, and meteors or shooting stars apparently falling from the sky.

Science flourished during the European Renaissance. Fundamental physical laws governing

planetary motion were discovered, and the orbits of the planets around the Sun were calculated.In the 17th century, astronomers pointed a new device called the telescope at the heavens and

made startling discoveries.

But the years since 1959 have amounted to a golden age of solar system exploration.

Advancements in rocketry after World War II enabled our machines to break the grip of Earth's

gravity and travel to the Moon and to other planets.

The United States has sent automated spacecraft, then human-crewed expeditions, to explore theMoon. Our automated machines have orbited and landed on Venus and Mars, explored

the Sun's environment, observed comets, and asteroids, and made close-range surveys whileflying past Mercury, Jupiter, Saturn, Uranus and Neptune.

These travelers brought a quantum leap in our knowledge and understanding of the solar system.Through the electronic sight and other "senses" of our automated spacecraft, color and

complexion have been given to worlds that for centuries appeared to Earth-bound eyes as fuzzy

disks or indistinct points of light. And dozens of previously unknown objects have beendiscovered.

Future historians will likely view these pioneering flights through the solar system as some of themost remarkable achievements of the 20th century.
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PLANETS

Introduction Sun Mercury Venus Earth

Mars Jupiter Saturn Uranus Neptune

Pluto Asteroids Comets Meteorites History
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CHARACTERISTIC

The Sun is by far the largest object in the solar system. It contains more

than 99.8% of the total mass of the Solar System (Jupiter contains most of the rest).

It is often said that the Sun is an "ordinary" star. That's true in the sense that there

are many others similar to it. But there are many more smaller stars than larger

ones; the Sun is in the top 10% by mass. The median size of stars in our galaxy is

probably less than half the mass of the Sun. The Sun is personified in many

mythologies: the Greeks called it Helios and the Romans called it Sol. The Sun is, atpresent, about 70% hydrogen and 28% helium by mass everything else ("metals")

amounts to less than 2%. This changes slowly over time as the Sun converts

hydrogen to helium in its core.

Mercury is the closest planet to the Sun and the eighth largest. Mercury is

slightly smaller in diameterthan the moons Ganymede and Titanbut more than twice

as massive.Mercury is in many ways similar to the Moon: its surface is heavily

cratered and very old; it has no plate tectonics. On the other hand, Mercury is much

denser than the Moon (5.43 gm/cm3 vs 3.34). Mercury is the second densest major

body in the solar system, afterEarth. Actually Earth's density is due in part to

gravitational compression; if not for this, Mercury would be denser than Earth. This

indicates that Mercury's dense iron core is relatively larger than Earth's, probably

comprising the majority of the planet. Mercury therefore has only a relatively

thin silicate mantle and crust.
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Venus has been known since prehistoric times. It is the brightest object in

the sky except for the Sun and the Moon. Like Mercury, it was popularly thought tobe two separate bodies: Eosphorus as the morning star and Hesperus as the evening

star, but the Greek astronomers knew better. (Venus's apparition as the morning star

is also sometimes called Lucifer.)

Earth is the only planet whose English name does not derive from

Greek/Roman mythology. The name derives from Old English and Germanic. There

are, of course, hundreds of other names for the planet in other languages. In Roman

Mythology, the goddess of the Earth was Tellus - the fertile soil (Greek: Gaia,terra

mater- Mother Earth). Earth, of course, can be studied without the aid of spacecraft.

Nevertheless it was not until the twentieth century that we had maps of the entire

planet. Pictures of the planet taken from space are of considerable importance; for

example, they are an enormous help in weather prediction and especially in tracking

and predicting hurricanes. And they are extraordinarily beautiful.

Mars (Greek: Ares) is the god of War. The planet probably got this name

due to its red color; Mars is sometimes referred to as the Red Planet. (An interesting

side note: the Roman god Mars was a god of agriculture before becoming associated

with the Greek Ares; those in favor of colonizing and terraforming Mars may prefer

this symbolism.) The name of the month March derives from Mars.

Mars has been known since prehistoric times. Of course, it has been extensively

studied with ground-based observatories. But even very large telescopes find Mars a

difficult target, it's just too small. It is still a favorite ofscience fiction writers as the

most favorable place in the Solar System (other than Earth!) for human habitation. But

the famous "canals" "seen" by Lowell and others were, unfortunately, just as

imaginary as Barsoomianprincesses.
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6/13

CURRENT AFFAIRS

Researchers Discovered Water on the Oldest Rocks of Moon

Researchers in the third week of February 2013 detected water traces inside the crystalline structureof one of the oldest lunar rocks which were obtained through Apollo missions on Moon. As per thestudy conducted by University of Michigan, the lunar highlands represent original crust which isactually crystallised from Magma Ocean that was found mainly on the molten early Moon.

Researchers made use of the Infrared spectroscopy for analysing water content in a part ofplagioclase feldspar from lunar anorthosites. Plagioclase feldspar from lunar anorthosites arebasically the lunar rocks which are formed of over 90 percent plagioclase.

It is believed that these bright-coloured highlands rocks formed early in the history of the moonwhen plagioclase crystallised from the magma ocean and came up to the surface. The infraredspectroscopy work found out about the presence of 6 parts per million of water in lunaranorthosites.

The water content that was measured is not actually liquid water but hydroxyl groups which weredistributed in mineral grain. These hydroxyl groups that were detected are evident that the interiorof the Moon contained water during the early molten state of it. Later the crust was solidified andplayed a crucial role in lunar basalts developments.

Because there are some oldest rocks from the Moon, therefore it is believed that water would have

been there in the Moon when it was formed. Earlier theories revealed that Moon was formed whenthe Mars-sized body bumped into the young Earth. Eventually the debris broke off and combinedinto new body. It was believed that a lot of water would have been evaporated in the space, leavingMoon arid.


7/13

Cosmic Rays Originate as the Result of Star Explosion:

Astronomers

The astronomers in the second week of February 2013 discovered the proof that cosmic raysoriginate as the results of explosions of stars or supernova, these are termed as the most energeticevent in the galaxy. Cosmic Rays were first discovered in 1912 by Victor Hess and it was believedthat these highly energetic particles that keep on hitting the atmosphere of earth from all directionsoriginate with the explosion of stars, but till now no direct evidence for the same conclusion wasavailable to the mankind.

The astronomers were successful in reaching to the conclusion as the findings of two experimentsone ground-based and the other one that was space-based, provided the same evidence, afterlooking on different Supernova Remnants (SNRs) in the sky. The observations were made ondifferent perspectives and in different parts of the sky.

The first study is based on the observations made by the astronomers from Max-Planck Institute forAstronomy, Heidelberg of the remnants of a 1000 year old supernova SN1006 from the EuropeanSouthern Observatorys (ESO) Very Large Telescope (VLT) based in Chile.

The second study was based on the years of data collected from the 10000 year old SNRs IC443that is located in Gemini Constellation at a distance of about 5000 light years from earth and W44that is located in Aquila Constellation at a distance of 10000 light years. The data of the two SNRswere collected by the scientists of Kavli Institute for Particle Physics and Cosmology at the SLACNational Accelerator laboratory by using NASAs Fermi Gamma Ray Telescope that was launched inJune 2008.

A supernova occurs twice or thrice in a century and it happens with the massive explosion of a star.The core of the exploded star remains as a neutron star or a black hole, whereas the parts ejecteddue to explosion flows in the space in form of debris by a powerful shockwave. The remnants of theexplosion remains in the sky for thousands of years and are used by the scientists and astronomersto study the facts about the cosmic rays.

Cosmic rays consist of about 90 percent proton, a nuclei and electrons. The two experiments donein space and ground claimed that evidence were found that protons that the protons accelerated tothe speed of light after being ejected due to shockwaves of the supernova. The mechanism wasproposed by Enrico Fermi in 1949 and it stated that the protons, which are trapped in the fastmoving shock region due to magnetic fields travelling through the shock front boosts itself to highspeeds after repeatedly being reflected in the magnetic field.

The protons gain energy of about one percent with every round trip and after making severalhundreds of such trips; it travels at the speed of light and finally releases itself from the shockwavefront. These charged protons, get it drifted due to the magnetic field that it experiences on its wayto earth resulting in distortion of its path. This is a reason that one cant decidedly say that the SNRsproduce cosmic rays.


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Astronomers Discovered Six Speeding Stars Racing Through

Milky Way

Astronomers in the third week of February 2013 discovered six speeding stars which were racing

through the space at a speed of 3.2 million kilometres per hour. These stars were ejected from the

huge black hole which sits in the middle of Earths galaxy, Milky Way.

These stars represented the first-known hypervelocity stars that have mass just like that of Earths

Sun. The discovery is said to be very important because it would reveal how stars were formed in

the dust-cloaked core of Milky Way.

The core of Milky Way is actually cloaked in dust which makes all stars unclear from telescopes of

the astronomers, except the brightest stars. But these hypervelocity stars were useful in providing a

peep into how star formation took place in the depths of Milky Way.

This is so because it is believed that the hypervelocity stars form when the black holes in the centre

of Milky Way consume one star in binary system and ejects other (its twin), throwing it through the

space at extremely high speed.

The astronomers explained that these stars were highly fast-moving objects which were

gravitationally unbound to Earths galaxy. Even though these stars were in proximity to black holes,

but they were not cloaked by dust and so they could be identified using telescopes easily.

Identifying these stars could help in revealing the kind of star formation that took place in galactic

centre.

Astronomers at University of Hawaii in their study made use of the data from Palomar 5-metre

telescope in California. In their study they discovered 130 stars in Milky Way which were traveling at

a fast pace. Then the astronomers narrowed down the group of stars which were traveling at

extremely fast speed with ejection from centre of Milky Way galaxy. Six of the stars met this

criterion.


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BIBLIOGRAPHY

1. http://www.solarviews.com/eng/sun.htm

2. en.wikipedia.org/wiki/Planet

3.www.planet-mag.com/
http://www.solarviews.com/eng/sun.htmhttp://www.solarviews.com/eng/sun.htm


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APRECIATION

ALL PRAISE FOR GOD THE ALMIGHTY, WITH HIS BLESSINGS,

THE SCIENCE SCRAPT BOOK IS READY.

I wish to acknowledge with gratitude

my parents, my teacher, my brotherand my friends .


11/13

SJK(T) SIMPANG LIMA

TAMAN SRI ANDALAS, KLANG

SCRAPT BOOK

SCIENCE

2013

SPACE

NAME : JAANANI A/P SIVANANTHAN

CLASS : 4 MANICKAVASAGAR

TEACHER : MRS SELVARANI


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CONTENTS

1. BIOGRAPHY

2. APRECIATION

3. INTRODUCTION OF SPACE

4. PLANETS

5. CHARACTERISTIC

6. CURRENT AFFAIRS

7. BIBLIOGRAPHY


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BIOGRAPHY

NAME : JAANANI D/O SIVANANTHAN

CLASS : 4 MANICKAVASAGAR

OBJECTIVE :

This assignment is an overview of the history,

mythology, and current scientific knowledge of the

planets, moons and other objects in our solarsystem. Each page has images and related

information.
http://nineplanets.org/overview.htmlhttp://nineplanets.org/overview.html

Documents

Introduction of space.docx