Short Notes: The Universe & The Sun
 

[B]UNIVERSE[/B]

[B]PLANET - ATTRIBUTE - MOON - ATMOSPHERE - REVOLUTIONARY PERIOD[/B]

[B]Mercury [/B](58 ml km) - Smallest - No - No - 88 -

[B]Venus[/B] - Hottest - No - CO2 - 225

[B]Earth[/B] – dia 12756 km, rad 6400 km - Colorful - 1 - N2,O2, argon, CO2,Neon, Helium, Methane, H2 - 365.25

[B]Mars[/B] - Red - 2 - Dark cloudy, H2 & Helium - 687

[B]Jupitar[/B] - Biggest/Heaviest, - shortest day - 61 - H2 and Helium - 11.86yr

[B]Saturn[/B] - Brightest - 23 - Rings of ice & dust - 29.46yr

[B]Uranus[/B] - Green due to Methane layer, - hottest, longest day - 15 - H2 and Helium - 84.01yrs

[B]Neptune[/B] (5900 m km far) - Blue due to Methane layer - 2 - H2 and Helium - 164.8yrs








[B][FONT="Arial Black"]THE MOON (LUNA)[/FONT][/B]
[LIST][*]Distance  385,000 km[*] Mass  81 times lighter than the earth [*] Rotation & Revolution  29 days, 7 hours, 43 minutes and 11.47 seconds[*] It has 1/6th gravitational attraction than the earth[*] It moves eastwards with the speed of 2100 miles per hour[*] Only 59% of moon surface can be seen from earth.[*] Moon’s surface is filled with crater due to non-existence of atmosphere which let meteorites come down and strike the moon surface.[/LIST]
[FONT="Arial Black"]THE SUN[/FONT]
[LIST][*]Distance  149 million km[*] Mass  2〖 X10〗^30[*] Diameter  1.4 million km[*] Composition  Hydrogen 90 %, Helium 8 %, Heavy elements 2%[*] Rotation  36 days[*] Revolution  250 bn years around center of the galaxy[*] Contains 99.86 % mass of solar system[*] Source of energy is nuclear fusion – conversion of hydrogen into helium[*] The surface of the sun is 4.6 billion years of age. [*] The surface temperature of the sun is 6000 C while the temperature at the center is 15 million C (Photosphere & Chromospheres) [*] In almost 5 billion years, when all hydrogen in its core has been used up, the sun into a red giant before becoming a white dwarf and finally will die out.[/LIST]