ABHIMANYU DAHIYA

Chapter 1 - The Earth in the Solar System Q.1: Answer the following questions briefly. (a) How does a planet differ from a star? (b) What is meant by the ‘Solar System’? (c) Name all the planets according to their distance from the sun. (d) Why is the Earth called a unique planet? (e) Why do we see only one side of the moon always? (f) What is the Universe ? Ans : (a) Stars are big and hot celestial bodies made up of gases. They have their own heat and light, which they emit in large amounts. Planets are also celestial bodies, but they do not have their own heat and light. They are lit by the light of stars. (b) The Sun, eight planets, satellites and some other celestial bodies known as asteroids and meteoroids form the solar system. (c) In order of their distance from the sun, the eight planets are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. (d) Conditions favorable to support life are probably present only on Earth. The Earth is neither too hot nor too cold...

Solar System, Jupiter, Structure of Atmosphere, Distance Between Sun and Planets in light hours, Weight on various planets, Age of Universe milky way solar system, Waves Hz, Solar System Chart, Earth size in galaxy, Earth vs Sun, Moons of Planets, Earth shape, Nebulae, biggest star size,  Planets rotation, 

June 21 is the Longest Day and the Shortest night in Northern hemisphere. Due to Tilted on it's Axis and Rotation around the Sun the position of the Earth is Different in different seasons in the year. The Northern Hemisphere tilted towards Sun in Summer (June 21st) and The  Southern Hemisphere tilted towards Sun in Winter (December 22nd). The summer solstice happens every year between June 20 and June 22 when the sun reaches its highest elevation in the Northern Hemisphere, making it the longest day of the year with a stretch of sunlight that lasts for 17 hours. The term solstice derives from Latin word “sol” meaning “sun” and “sistere” which means “to make stand, ”   The Duration of the Daylight is Different on various latitudes likely in the figure show in the following picture....   Earth Seasons  Summer Solstice - when Sun is directly over Tropic of Cancer on June 21st.