إعـــــــلان

**Fattema** · 01-02-2009, 09:49 AM

المشاركة الأصلية بواسطة طائر المساء

I know it is very short

At this stage it is interesting for you and that's good

After posting next part you will wanna to be Ms Astronomer

Believe me

Take care

Respects & regards

Whaaaaaaaaaaaaaaaaat ! Short !

OMG

You mean the next part will be shorter !

No don't even try ! I won't be so.

Let's see your next part .... الله يستر

:p

**طائر المساء** · 08-02-2009, 04:54 PM

المشاركة الأصلية بواسطة Fattema

Whaaaaaaaaaaaaaaaaat ! Short !

OMG

You mean the next part will be shorter !

No don't even try ! I won't be so.

Let's see your next part .... الله يستر

:p [/left]

Insha-Allah it will be shorter

But I don't think so

You have to wait until I post next part to see if it is shorter or not

Oh, Am I late
?

I will continue as soon as possible Insha-Allah
Kind Respects & Regards

**طائر المساء** · 12-02-2009, 01:50 AM

المشاركة الأصلية بواسطة Fattema

Whaaaaaaaaaaaaaaaaat ! Short !

OMG

You mean the next part will be shorter !

No don't even try ! I won't be so.

Let's see your next part .... الله يستر

:p [/left]

Assalam Alykum our absent dear sister Fattema

I tried to make the next part as short as possible

but it still seems long

I hope that it will not be very long Insha-Allah

May Allah(swt) bless you & protect you

**طائر المساء** · 12-02-2009, 02:12 AM

Solar System

The Solar System consists of the Sun and those celestial objects bound to it by gravity. These objects are the eight planets, their 166 known moons, five dwarf planets, and billions of small bodies. The small bodies include asteroids, icy Kuiper belt objects, comets, meteoroids, and interplanetary dust.
The charted regions of the Solar System are the Sun, four terrestrial inner planets, the asteroid belt, four gas giant outer planets, the Kuiper belt and the scattered disc. The hypothetical Oort cloud may also exist at a distance roughly a thousand times beyond the charted regions.

A flow of plasma from the Sun (the solar wind) permeates the Solar System. This creates a bubble in the interstellar medium known as the heliosphere, which extends out to the middle of the scattered disc.
In order of their distances from the Sun, the eight planets are:

1. Mercury
2. Venus
3. Earth
4. Mars
5. Jupiter
6. Saturn
7. Uranus
8. Neptune

As of mid-2008, five smaller objects are classified as dwarf planets. Ceres is in the asteroid belt, and four orbit the Sun beyond Neptune: Pluto (formerly classified as the ninth planet), Haumea, Makemake, and Eris.
Six of the planets and three of the dwarf planets are orbited by natural satellites, usually termed "moons" after Earth's Moon. Each of the outer planets is encircled by planetary rings of dust and other particles.

Structure

The principal component of the Solar System is the Sun, a main sequence G2 star that contains 99.86 percent of the system's known mass and dominates it gravitationally. Jupiter and Saturn, the Sun's two largest orbiting bodies, account for more than 90 percent of the system's remaining mass.
Most large objects in orbit around the Sun lie near the plane of Earth's orbit, known as the ecliptic. The planets are very close to the ecliptic while comets and Kuiper belt objects are usually at significantly greater angles to it.

All of the planets and most other objects also orbit with the Sun's rotation (counter-clockwise, as viewed from above the Sun's north pole). There are exceptions, such as Halley's Comet.
Kepler's laws of planetary motion describe the orbits of objects about the Sun. According to Kepler's laws, each object travels along an ellipse with the Sun at one focus. Objects closer to the Sun (with smaller semi-major axes) have shorter years. On an elliptical orbit, a body's distance from the Sun varies over the course of its year. A body's closest approach to the Sun is called its perihelion, while its most distant point from the Sun is called its aphelion. Each body moves fastest at its perihelion and slowest at its aphelion. The orbits of the planets are nearly circular, but many comets, asteroids and Kuiper belt objects follow highly elliptical orbits.

Most of the planets in the Solar System possess secondary systems of their own. Many are in turn orbited by planetary objects called natural satellites, or moons, some of which are larger than planets. Most of the largest natural satellites are in synchronous orbit, with one face permanently turned toward their parent. The four largest planets also possess planetary rings, thin bands of tiny particles that orbit them in unison.

Terminology

Informally, the Solar System is sometimes divided into separate regions. The inner Solar System includes the four terrestrial planets and the main asteroid belt. The outer Solar System is beyond the asteroids, including the four gas giant planets. Since the discovery of the Kuiper belt, the outermost parts of the Solar System are considered a distinct region consisting of the objects beyond Neptune.

Dynamically and physically, objects orbiting the Sun are classed into three categories: planets, dwarf planets and small Solar System bodies. A planet is any body in orbit around the Sun that has enough mass to form itself into a spherical shape and has cleared its immediate neighbourhood of all smaller objects. By this definition, the Solar System has eight known planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto was demoted from planetary status, as it has not cleared its orbit of surrounding Kuiper belt objects. A dwarf planet is a celestial body orbiting the Sun that is massive enough to be rounded by its own gravity but which has not cleared its neighbouring region of planetesimals and is not a satellite. By this definition, the Solar System has five known dwarf planets: Ceres, Pluto, Haumea, Makemake, and Eris. Other objects that may become classified as dwarf planets are Sedna, Orcus, and Quaoar. Dwarf planets that orbit in the trans-Neptunian region are called "plutoids." The remainder of the objects in orbit around the Sun are small Solar System bodies.

Planetary scientists use the terms gas, ice, and rock to describe the various classes of substances found throughout the Solar System. Rock is used to describe compounds with high melting points (greater than roughly 500 K), such as silicates. Rocky substances are prent in the inner Solar System, forming most of the terrestrial planets and asteroids. Gases are materials with low melting points such as atomic hydrogen, helium, and noble gases; they dominate the middle region, comprising most of Jupiter and Saturn. Ices, like water, methane, ammonia, and carbon dioxide, have melting points up to a few hundred Kelvin. Icy substances comprise the majority of the satellites of the giant planets, as well as most of Uranus and Neptune (the so-called "ice giants") and the numerous small objects that lie beyond Neptune's orbit. The term volatiles refers collectively to all materials with low boiling points (less than a few hundred Kelvin), including gases and ices; depending on the temperature, volatiles can be found as ices, liquids, or gases in various places in the Solar System.

Interplanetary medium

Along with light, the Sun radiates a continuous stream of charged particles (a plasma) known as the solar wind. This stream of particles spreads outwards at roughly 1.5 million kilometres per hour, creating a tenuous atmosphere (the heliosphere) that permeates the Solar System out to at least 100 AU (see heliopause). This is known as the interplanetary medium. Geomagnetic storms on the Sun's surface, such as solar flares and coronal mass ejections, disturb the heliosphere, creating space weather. The Sun's rotating magnetic field acts on the interplanetary medium to create the heliospheric current sheet, the largest structure in the Solar System.

The heliospheric current sheet

Earth's magnetic field protects its atmosphere from interacting with the solar wind. Venus and Mars do not have magnetic fields, and the solar wind causes their atmospheres to gradually bleed away into space. The interaction of the solar wind with Earth's magnetic field creates the aurorae seen near the magnetic poles.
Cosmic rays originate outside the Solar System. The heliosphere partially shields the Solar System, and planetary magnetic fields (for those planets that have them) also provide some protection. The density of cosmic rays in the interstellar medium and the strength of the Sun's magnetic field change on very long timescales, so the level of cosmic radiation in the Solar System varies, though by how much is unknown.
The interplanetary medium is home to at least two disc-like regions of cosmic dust. The first, the zodiacal dust cloud, lies in the inner Solar System and causes zodiacal light. It was likely formed by collisions within the asteroid belt brought on by interactions with the planets. The second extends from about 10 AU to about 40 AU, and was probably created by similar collisions within the Kuiper belt.

Aurora australis seen from orbit

**طائر المساء** · 27-02-2009, 10:16 PM

We will continue posting next parts when our dear sister Fattema come back Insha-Allah

**طائر المساء** · 05-06-2009, 05:45 PM

Enjoy this vedio about solar system while waiting for the coming of dear sister Fattema

http://www.youtube.com/watch?v=mtKNH2Y2OJM

للأسف لا يمكن وضعه هنا بشكل مباشر من المصدر نفسه لكنه فيلم جميل جدا من برنامج سبيس سكول او مدرسة الفضاء

**طائر المساء** · 08-06-2009, 12:34 AM

Fortunately here is the same video

**Fattema** · 01-03-2010, 11:36 PM

المشاركة الأصلية بواسطة طائر المساء

We will continue posting next parts when our dear sister Fattema come back Insha-Allah

Oh Masha-Allah brother 6a2er Al-Masa2 ! You're a really sincere brother

I must be lucky then to have such a great brother like you

Thanks a lot for waiting for me.So glad to hear that ! And now am back

Hope you're doing well Insha-Allah

**Fattema** · 01-03-2010, 11:56 PM

المشاركة الأصلية بواسطة طائر المساء

Enjoy this vedio about solar system while waiting for the coming of dear sister Fattema

http://www.youtube.com/watch?v=mtKNH2Y2OJM

للأسف لا يمكن وضعه هنا بشكل مباشر من المصدر نفسه لكنه فيلم جميل جدا من برنامج سبيس سكول او مدرسة الفضاء

Salaamu Alaykum

What an interseting show ! I enjoyed watching it, indeed

Thanks a lot dear brother 6a2er Al-Masa2

Your wonderful effort is highly appreciated

May Allah Bless you & Protect you

**طائر المساء** · 04-03-2010, 12:35 AM

المشاركة الأصلية بواسطة Fattema

Oh Masha-Allah brother 6a2er Al-Masa2 ! You're a really sincere brother

I must be lucky then to have such a great brother like you

Thanks a lot for waiting for me.So glad to hear that ! And now am back

Hope you're doing well Insha-Allah

المشاركة الأصلية بواسطة Fattema

Salaamu Alaykum

What an interseting show ! I enjoyed watching it, indeed

Thanks a lot dear brother 6a2er Al-Masa2

Your wonderful effort is highly appreciated

May Allah Bless you & Protect you

وعليكم السلام والرحمة اختي الفاضلة فاطمة

Welcome back dear sister Fattema at Yahosain Forums

أهلا وسهلا بكم مجددا في منتدانا المبارك وأطيب التهاني والتبريكات لكم بالمولد النبوي الشريف
نحمد الله تبارك وتعالى أنكم بخير وعافية وأسعدنا تواجدكم بعد طول غياب
وأشكركم كثيراً على كلماتكم الطيبة

بلا شك المقطع جميل ورائع ويتحدث بشكل مختصر ووافي عن النظام الشمسي بمختلف مكوناته الرئيسية
وإن شاء الله سأستكمل الموضوع في أقرب فرصة ممكنة

نورتم المنتدى بحضوركم
حياكم الله اختي فاطمة وأهلا ومرحبا بكم

**Fattema** · 04-03-2010, 02:36 PM

Thanks a lot my brother 6a2er Al-Masa2

وأسعد الله ايامكم واطيب التهاني والتبريكات لكم

Am so cheerful to see you again. I really appreciate your comments & kind words

I hope to see you @ Yahosein Forums always & forever

منور المنتدى بوجودكم ياخوي وبالتاكيد نحن بأنتظار التكملة ..

والغياب ممنوع !!

تحياتي واحترامي

**Fattema** · 04-03-2010, 02:39 PM

And Thanks a million !

**طائر المساء** · 07-03-2010, 06:39 PM

اللهم صل على محمد وآل محمد الطيبين الطاهرين
وأسعد الله أيامكم اختي الفاضلة فاطمة وجعلها عامرة بالبهجة والأفراح بارك الله بكم وحفظكم

مسرورون بحضوركم الطيب المبارك
أشكركم كثيرا اختي فاطمة وأنا في الحقيقة بتمنى أن أواصل تواجدي معكم في المنتدى ولكن الظروف وضيق الوقت أصبحا أقوى في الفترة الأخيرة وخلال الأسابيع القليلة الماضية بالتحديد ويعلم الله ذلك
وأعتذر لكم اختي لأني قلت غياب بصمت كما وأعتذر لكم لذكري موضوع الغياب الآن خصوصا وأنكم في بداية رجوعكم للمنتدى فأنا متأسف جداً لذلك
ان شاء الله سأواصل معكم في الفترة القريبة القادمة قدر الإمكان والمستطاع والى ان يشاء الله

وأكيد لي عودة لإكمال الموضوع في أقرب فرصة

أطيب التحيات لكم
كل التقدير والإحترام

**Fattema** · 07-03-2010, 09:32 PM

الف شكر لك اخوي طائر المساء , كلك ذوق ,

من غير اعتذار واسف ياخوي , مقدرين لكم ظروفكم ,

وانا بانتظار التكلمة ترى !!!

سلمكم الله تعالى ووفقكم لكل خير ,

**انصار الصدر00** · 08-03-2010, 12:05 PM

nice picture

إعـــــــلان

للاشتراك في (قناة العلم والإيمان): واتساب - يوتيوب

The Solar System

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