Universe, Earth & Its Motions
सौरमंडल एवं ग्रह
Solar System — Introduction
The Solar System consists of the Sun and all celestial bodies that orbit it — planets, moons, asteroids, comets, and dwarf planets.
This chapter frequently appears in BPSC TRE-4 General Knowledge / Science sections.
सौरमंडल एवं ग्रह
The Sun
The Sun is the star at the centre of our Solar System.
सौरमंडल एवं ग्रह
The Eight Planets (Order from Sun)
My Very Educated Mother Just Served Us Noodles
(Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune)
सौरमंडल एवं ग्रह
Moon, Asteroids & Comets
Moon:
Asteroids: Rocky bodies orbiting the Sun, mostly in the Asteroid Belt between Mars and Jupiter.
Comets: Icy bodies with bright tails when near the Sun. Famous: Halley's Comet — visible every ~76 years (last seen 1986; next ~2061).
Dwarf Planets: Pluto (reclassified in 2006), Eris, Ceres.
सौरमंडल एवं ग्रह
Points to Remember
पृथ्वी एवं महाद्वीप
Earth & Continents — Introduction
Earth is the third planet from the Sun and the only known planet with life.
पृथ्वी एवं महाद्वीप
Seven Continents
Earth has 7 continents (largest to smallest by area):
पृथ्वी एवं महाद्वीप
Five Oceans
Earth has 5 oceans (largest to smallest):
Indian Ocean is important for India's trade routes and monsoon system.
पृथ्वी एवं महाद्वीप
Latitudes, Longitudes & Time Zones
Latitude: Horizontal lines; measure distance north/south of Equator (0°).
Longitude: Vertical lines; measure distance east/west of Prime Meridian (0°) — passes through Greenwich, England.
Time zones: Every 15° longitude = 1 hour difference.
पृथ्वी एवं महाद्वीप
Points to Remember