The twelve constellations referred to as the zodiac are imaginary regions that encompass the path of the planets.
A comet is a celestial body moving around the solar system in elliptical or hyperbolic orbits, usually accompanied by a shining tail.
The temperature of the sun’s outer surface is 6000°C.
The planet that spins on its axis at the fastest rate is Mercury.
The biggest planet in size is Jupiter.
The planet that was dropped from the list of planets in 2006 is Pluto.
The term meteor is applied to an interplanetary body after it enters the Earth’s atmosphere and explodes in mid-air as a ball of fire.
Among the planets of the solar system, the one with the longest period of rotation is Venus.
Shooting stars are meteors.
The watery planet is Earth.
The solar system was discovered by Copernicus.
Huge congregations of stars held together by the force of gravity are known as galaxies.
The unit of measuring distances between the stars is known as light-year.
The planet that looks reddish in the night sky is Mars.
The planets are kept in motion in their respective orbits by gravitation and centrifugal force.
The study of heavenly bodies is known as astronomy.
The Milky Way extends for a distance of 100,000 light-years.
Supernova is a dying star.
Celestial bodies appear to be moving due to the Earth’s rotation.
The period of one revolution of the sun around the center of the galaxy is called a galactic year.
Cosmology deals with the description and mapping of the main features of the universe.
The same side of the moon always faces the Earth because the period of rotation of the moon on its axis is almost the same as its revolution around the Earth.
The light coming from stars gives the idea of their mass.
The constellations of stars appear at different positions in the sky at different times during the night mainly because the Earth revolves around the sun.
Sunspots cause magnetic storms on the surface of the sun, polar auroras, and solar flares.
“Parsec” is the unit of measurement of astronomical distance.
The distance of the nearest star besides the sun from the Earth is 4 light-years.
A lunar eclipse does not occur every month because the sun’s orbit is not always in the same plane as the moon.
The brightest star in the sky is Sirius.
Lunar Sea refers to a dark plain on the moon.
The time required by moon light to reach the Earth is 1.3 seconds.
The solar corona mainly consists of molten rays.
Mercury and Venus are the two planets of the solar system that have no satellites.
Hydrogen is the most predominant element in the sun.
The smallest planet is Mercury.
If there was no sun, the color of the sky would be black.
Neptune is the planet at the farthest distance from the Earth.
The solar wind is composed of an outward stream of protons on the sun’s surface.
A solar eclipse occurs when the moon comes between the sun and the Earth.
The largest planet of the solar system is Jupiter.
Tides are caused by the gravitational pull of the sun and the moon on Earth.
Io is not a satellite of Jupiter.
The moon is called a satellite of the Earth because it revolves around the Earth.
Comets revolve around the sun.
The position of a planet when it is nearest to the sun is called perihelion.
The “Red Planet” is Mars.
The “Earth Twin” is Venus.
The Saturn rings were discovered by Galileo.
Halley’s comet appears once in a period of 76 years.
Jupiter is larger than the Earth by about 11 times.
A lunar eclipse occurs on a full moon.
Only Mercury and Venus have no satellites among the planets in the solar system.
The hottest planet is Venus.
The distance between the Earth and the sun in millions of kilometres is 149.6.
A terrestrial planet is a planet of a dense, rocky body.
The planet having 27 moons is Uranus.
The planets nearest to the sun are Mercury and Venus.
The brightest planet is Venus.
The orbits of planets around the sun, or of satellites around the Earth, can be circular and elliptic.
The fastest planet is Mercury.
The planet that has no satellite is Venus.
The change in colour of stars arises due to variation in their surface temperature.
The North Star is a part of the constellation Little Dipper.
To a space traveller on the moon, the lunar sky during daytime appears black.
The outermost layer of the sun is called corona.
The planet having the largest number of satellites in the solar system is Saturn.
The radiant energy of the sun is transmitted in the form of short waves.
The planet that lies at the farthest distance from the sun is Neptune.
Among the inner planets, Mars is the largest.
Tides are the highest when the Earth is nearest to the moon.
The coldest planet is Uranus.
Asteroids have their orbits between the planets Mars and Jupiter.
The year is longest on Earth.
A bright heavenly body with a long luminous tail is called a comet.
The four largest planets of the solar system in descending order are Jupiter, Saturn, Uranus, and Neptune.
On Venus, the sun rises in the west and sets in the east.
