Kepler\'s first law states that Earth\'s orbit around the San takes the shape of
ID: 1639245 • Letter: K
Question
Kepler's first law states that Earth's orbit around the San takes the shape of s(n) _______. The solar system model of Copernicus is known as the ______ model. The Earth-centered model of the solar system is called the _____ model. T^2 - kR^3 is known as ______. When a planet has the same meridian as a star, the planet is said to be in _______. The point of a planet's orbit furthest from the Sun is called the ______. The fraction of incident sunlight reflected by a celestial body is called its ______. In 1851, Earth's rotation was demonstrated using a(n) ______. _______ is the apparent motion that occurs between two fixed objects when the observer changes positions. The apparent displacement in the direction of light coming from a star because of Earth's orbital motion is called the ______. The planet that most resembles Earth is ______. The planets with known rings are Saturn, Neptune, ________, and Jupiter. The planet ________ contains more than half the mass of the solar system not in the Sun. The most distant planet that can be seen with the unaided eye is ______. The planet _____ has retrograde motion.Explanation / Answer
1. Earth's orbbit around the sun is of an elliptical shape (Ellipse) as per Kepler's law of motion.
2. The solar system model of Copernicus is known as heliocentric system. In this he had stated that Sun and not the Earth was the centre of solar system as percieved previously.
3. Earh centred model of soalr system is called Geocentric model. Also known as Ptolemaic system it was proposed by Ptolemy.
4. T2 = kR3 is Kepler's third law of motion, where T= time period of orbit, R = Radius of Orbit and k = Kepler's constant.
5. When a planet has same meridian as that of a star, the planet is said to be in Conjuction.
6. The farthest point is called is Aphelion. And the opposite i.e the closest point is called as Perihelion.
7. The fraction of incident sunlight reflected by a celestial body is called Albedo. It is the ratio of total incident light to that of total light reflected by the body. It has no unit and is dimensionless which is measured on the scale of 0 to 10.
8. In 1851, Earth's rotation was demonstrated using Faucault Pendulum by French physicist Leon Faucault.
9. Parallax is the apparent motion that occurs between two fixed objects when observer changes its position.
10. Aberration of starlight
11. Mars
12. Uranus is also a planet with ring.
13. Jupiter has the most mass of all the planet. i.e 1898 x 1024 kg.
14. Saturn is the most distant planet to be seen with unaided eyes.
15. Jupiter, Mars and Saturn all have retrogade motion when seen from Earth. Retrogade motion is just an illusion beacuse of earth's motion and is not real. [ But since Venus rotates about its axis in opposite direction to that of all other planets. One would see a real retrogarde motion of celestial bodies in Venus. Example sun would rise in west and set in east. ]
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