-The Starting Point of the Universe is thought to be the Big Bang, a Rapid Expansion at
the speed of Light Matters, Evidence by Hubble's Universe Expansion expLAineD in Law and
Microwave Background Radiation. The universe contains three main component; Dark Matter
(26.8%), Dark Energy (68.3), and Ordinary Matter (Normal element) (4.9%). Two of the largest
are Type of Astronomical Body; Galaxies and Nebula. Galaxy is the System of Billions of star
gravitationally Bond Together, while Nebula Cloud of Interstellar gas and dust is just.
In astronomy, there are 3 Length of Main UNIT: Astronomical UNIT (AU), Light years and
Parsec. Astronomical Unit is the Distance between Earth and Sun, which approximately 1.5
× 1011 M. Light-years is the Distance which Light Can travel in 1 Earth-years therefore would be
Equal 60 (Second per minute) * 60 (minute per hour) * 24 (hour per Day) 365.25 (Day per year) * 3 × 108
(. m / S) = 9.5 × 1015 m. Distance at which one is the one Parsec Astronomical UNIT subtends an
Angle of Arc Second one which would be 3.0857 × Around the 1,016th M or 26/03 Light-years.
The Study of astronomy Can be Tracked Ancient time to be. Earliest Record of the
Astronomical phenomenon is Belong to Sumerian, a Mesopotamian civilization in Era. While not
the First civilization to Study astronomy, however with numerous philosopher, Ancient Greek had
many Idea contributed to astronomy. Around the orbiting one of the ideas is the Center of stars
and planets. Although Proposed by Aristarchus is that the Sun Center of the System, Most
philosophers believed that Earth is the Center of Universe. Another civilization that have influent
on astronomy are Arabians (or Muslim Community) Evidence of star name by which many are
Arabic. In the Modern time, one of the well-Known Astronomer Johannes Kepler is Who Propose
Kepler's Law of Planetary Motion.
The brightness of star is ranked by magnitude scale, the higher the magnitude, the
Dimmer star. There are Two Type of magnitude apparent magnitude, the brightness appear on
Earth, and Absolute magnitude, the assumed brightness at 10AU from each star
Galaxies are classified by its shape as it the only Thing Can we actually Observe. There
are 3 types of galaxies and 1 subtype; Spiral galaxies, and galaxies Elliptical galaxies Irregular.
Spiral Into Normal and Barred Can also be Divine. Generally, there are 3 Parts of galaxies that we
Can See, Bulk or Center of the galaxies, Spiral Spiral Disk or ARM, and Halo. While all 3 Can be
spotted in Spiral galaxies, only Bulk and Halo are in Elliptical. However in irregular galaxies there
are no distinctive shape as each Part. Barred Spiral Milky Way is our Solar System is Born Galaxies.The when the Formation of the Sun which was BEGIN Around 5
billion years ago. Astronomical Object Can be Separated in to Part 4, Inner planets, Asteroid Belt,
Outer planets, and comet or Oort Cloud's from the Sun to Outer Space respectively. Planets in
Solar System must have 3 characteristics 1) Around orbiting the Sun, 2) Due to its shape is Stable
own Gravity and 3) has cleared the Neighborhood Around its Orbit. Planets Can be classified in to
2 types, Rocky planets, Solid surface with Metallic Core, and gas planets, Liquid or no surface
or with Stone Ice core. The Sun has About 7 layer of structure and atmosphere, while the core,
where Nuclease Fusion occur, is Around 15 million Degrees Celsius, the hottest layer is believed
to be the Corona, the Outer Part of the Sun's atmosphere, at 20 million Degrees Celsius. .
-Planets from Biggest to Smallest Size: Jupiter, Saturn, Uranus, Neptune, Earth, Venus,
Mars, and Mercury.
-Planets with moons; Mars (2 moons), Earth (1 Moon), Jupiter (67 moons), Saturn (62
moons), Uranus (27 Moons), and Neptune (13 Moons)
-Planets with Rings; Jupiter, Saturn, Uranus, Neptune.
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