Astronomy guide to the solarsystem and beyond

Brief Description about Astronomy

1. UNIVERSE AND IT’S BOUNDARIES

2. HOW BIG IS A BILLION FIGURE (100 CRORES)   If you  take  a  billion COINS AMOUNT  and divide it by the number of seconds in a day you get 11,574 days. Divide this by 365 days and you get 31.7 years . SO IT WILL TAKE 31.7 YEARS TOCOUNT 1 BILLION COINS.

3. 13.733   billion years  AGE OF UNIVERSE

4. HOW UNIVERSE STARTED BIG BANG

5. OUR SUN

6. OUR SOLAR FAMILY

7. MERCURY Mercury does not have any moons or rings. Your weight on Mercury would be 38% of your weight on Earth. A day on the surface of Mercury lasts 176 Earth days. A year on Mercury takes 88 Earth days. Mercury has a diameter of 4,879 km, making it the smallest plane t .

8. VENUS Venus does not have any moons or rings. Venus is nearly as big as the Earth with a diameter of 12,104 km. Venus is thought to be made up of a central iron core, rocky mantle and silicate crust. The surface temperature on Venus can reach 471 °C. A day on Venus lasts longer than a year.  It takes 243 Earth days to rotate once on its axis (sidereal day). The planet’s orbit around the Sun takes 225 Earth days, compared to the Earth’s 365. A day on the surface of Venus (solar day) takes 117 Earth days .

9. EARTH The Earth’s rotation is gradually slowing. The Earth is the densest planet in the Solar System. 17 milliseconds per hundred years Earth doesn’t take 24 hours to rotate on its axis It’s actually 23 hours, 56 minutes and 4 seconds

10. MARS Mars and Earth have approximately the same landmass . MARS HAS 2 MOONS. Mars is home to the tallest mountain in the solar system. Olympus Mons There are signs of liquid water on Mars. One day Mars will have a ring. In the next 20-40 million years Mars’ largest moon Phobos will be torn apart by gravitational forces leading to the creation of a ring that could last up to 100 million years.

11. THE ASTEROID BELT Asteroid Belt objects are made of rock and stone. Some are solid objects, while others are orbiting “rubble piles”.   The Asteroid Belt contains billions and billions of asteroids. Some asteroids in the Belt are quite large , but most range in size down to pebbles. The asteroid 1/Ceres is also designated as a dwarf planet, the largest one in the inner solar system. We know of at least 7,000 asteroids.

12. JUPITER Jupiter has the shortest day of all the planets . Jupiter orbits the Sun once every 11.8 Earth years. Jupiter’s moon Ganymede is the largest moon in the solar system . Jupiter has a thin ring system . JUPITER HAVE 79 MOONS.

13. SATURN Saturn is the flattest planet. Its polar diameter is 90% of its equatorial diameter Saturn is made mostly of hydrogen. Titan is a moon with complex and dense nitrogen-rich atmosphere . SATURN HAS 62 MOONS.

14. URANUS Uranus has two sets of very thin dark coloured rings. The uppeR atmosphere is made of water, ammonia and methane ice crystals that give the planet its pale blue colour . Uranus is often referred to as an “ice giant” planet. URANUS HAVE 27 MOONS

15. NEPTUNE The atmosphere of Neptune is made of hydrogen and helium, with some methane. Neptune has a very thin collection of rings. Neptune has 14 moons. The Great Dark Spot in the southern atmosphere of Neptune was first discovered in 1989 by the Voyager 2 spacecraft.

16. WE WILL GIVE PLUTO A TRIBUTE TOO Pluto was reclassified from a planet to a dwarf planet in 2006. This is when the IAU formalised the definition of a planet as “A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.” Pluto is one third water& IT HAVE 5 MOONS. Pluto has a eccentric and inclined orbit. This takes it between 4.4 and 7.3 billion km from the Sun meaning Pluto is periodically closer to the Sun than Neptune . Pluto sometimes has an atmosphere. When Pluto elliptical orbit takes it closer to the Sun, its surface ice thaws and forms a thin atmosphere primarily of nitrogen which slowly escapes the planet

17. WHAT IS LIFE AND HOW IT CAME INTO EXISTANCE ON EARTH THE STATE OF BEING CONSCIOUS IS TERMED AS BEING LIVING ACCORDING TO SCIENTISTS AND Philosophers LIFE CAME INTO EXISTANCE IN THE FOLLOWING WAYS:- INTELLIGENT DESIGNER. PRIMORDIAL SOUP. Panspermia HYPOTHESIS. ZOO HYPOTHESIS.

18. ALIEN LIFE FORMS

19. HOW ALIENS WOULD ACTUALLY LOOK LIKE