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Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be on such an orbit when: 1. The orbit is geosynchronous. 2. The orbit is circular. 3. The orbit lies in the plane of the Earth's equator. 4. The orbit is at an altitude of 22,236 km. Select the correct answer using the codes given below: 
It is known to us that a planet revolves around the sun in an elliptical orbit with the sun at one of the foci. If the point in the orbit nearest to the sun is called the perihelion and the point farthest from the sun is called the aphelion, which of the following statement is correct? 
Which of the following statements about the movement of planets is true? A. A planet's orbit is elliptical with the Sun at one of two focal points. B. The orbit of a planet is circular with the sun in the center. C. The orbit of a planet is elliptical with another planet in one of the two center-points. D. The orbit of a planet is circular with another planet in the center. 
Given below are four jumbled sentences. Select the option that gives their correct order. A.The axis of rotation of the Earth when compared to the Earth's orbit around the Sun. B.The only astronomical object that is known to harbour life, is the Earth which is the third planet from the sun. C.As a result, the Northern and the Southern hemispheres point toward or away from the Sun. D.It revolves around the sun and at the same time it spins on an imaginary line called an axis which runs from the North pole to the south pole.
Which two classes use the Shape class correctly?
A. public class Circle implements Shape { private int radius; }B. public abstract class Circle extends Shape { private int radius; }C. public class Circle extends Shape { private int radius; public void draw(); }D. public abstract class Circle implements Shape { private int radius; public void draw(); }E. public class Circle extends Shape { private int radius; public void draw() { /* code here */ } }F. public abstract class Circle implements Shape { private int radius; public void draw() { /* code here */ } }
On 17 January 2021, Virgin Orbit the California-based satellite launch company recently launched its Launcher One rocket to orbit. What statements is/are CORRECT regarding the rocket? 1. It places the satellites in Sun Synchronous Orbit 2. It is the first all liquid-fuelled air-launched orbital rocket 3. It is capable of carrying payloads of up to 500–600 kg to a 310-mile-high (500-km) polar orbit Select the correct answer using the code given below. (A) 1 only (B) 2 only (C) Both 1 and 2 (D) Both 2 and 3
What is the specific energy of an asteroid in a circular orbit around the Sun of radius 4.8 AU. The gravitational parameter of Sun is 1.327124 x 1011 km3/s2.
With reference to celestial bodies, consider the following statements. 1. A Satellite is a celestial body that moves around the planets in the same way as the planets move around the sun. 2. Apart from the stars, planets and satellites, there are numerous tiny bodies that also move around the sun. These bodies are called meteoroids. 3. The small pieces of rocks which move around the sun are called asteroids. Which of the following statements is/are correct?
Consider the following statements- 1. Every planet moves around the earth in an elliptical orbit with the earth at one of the foci. 2. The line joining the sun to the planet sweeps out equal areas in equal intervals of time. i.e. areal velocity is constant. 3. The square of the period of revolution (T) of any planet around the sun is directly proportional to the cube of the semi-major axis of the orbit Which of the following statement is INCORRECT?
In the question given below are two conclusions followed by five statements. You have to choose the correct set of statements that logically satisfies conclusions. Conclusions: I. Some Star are Moon II. Some Sun are not Mars Statements: I. Some Sun are Moon, Some Moon are star and No star is Mars. II. Some Sun are Moon, All Moon are Star and No Star is Mars. III. All Sun are Moon, All Moon are Star and Some Star are Mars. IV. All Sun are Moon, Some Moon are Star and No Star is Mars. V. Some Sun are Moon, Some Moon are Star and No Moon is Mars.