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The colour of the star is an indication of its
Distance from the earth
Distance from the sun
Temperature
Luminosity
The colour of the star is an indication of its temperature. The glowing is caused by something called Black-Body radiation, which has to do with the heat energy trying to radiate away in more and more energetic wavelengths. Red stars are relatively cool at only a few thousand degrees Celsius, white stars are hot at about ten thousand degrees, and blue stars are the hottest.
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The planet nearest to the sun is
Mercury
Earth
Venus
Pluto
The planet nearest to the sun is mercury. Mercury is the smallest and closest to the Sun of the eight planets in the Solar System, with an orbital period of about 88 Earth days.
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The group of stars arranged in a definite pattern is called
Milky way
Constellation
Andromeda
Solar system
The group of stars arranged in a definite pattern is called constellation. In modem astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, which are patterns formed by prominent stars within apparent proximity to one another on Earth's night sky.
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The Asteroid belt is found between which of the following?
Earth and Mars
Jupiter and Saturn
Mars and Jupiter
Saturn and Uranus
The Asteroid belt is found between Mars and Jupiter. The large majority of known asteroids orbit in the asteroid belt between the orbits of Mars and Jupiter, or are co-orbital with Jupiter.
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Which one of the following is the largest satellite in solar system?
Ganymede
Titan
Europa
Triton
Ganymede is the largest satellite in solar system. Ganymede is a satellite of Jupiter and the largest moon in the Solar System. It is the seventh moon and third Galilean satellite outward from Jupiter. Completing an orbit in roughly seven days, Ganymede participates in a 1:2:4 orbital resonance with the moons Europa and Io, respectively. It has a diameter of 5,268 km (3,273 mi), 8% larger than that of the planet Mercury, but has only 45% of the latter's mass.
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Methane is present in the atmosphere of
Moon
Sun
Jupiter
Mars
Methane is present in the atmosphere of Jupiter. The atmosphere of Jupiter is the largest planetary atmosphere in the Solar System. It is mostly made of molecular hydrogen and helium in roughly solar proportions; other chemical compounds are present only in small amounts and include methane, ammonia, hydrogen sulphide and water.
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Which planet takes the longest time to go around the sun?
Earth
Jupiter
Uranus
Neptune
Neptune takes the longest time to go around the sun. Neptune orbits the Sun at an average distance of 4.5 billion km. Like all the planets in the Solar System, Neptune follows an elliptical path around the Sun, varying its distance to the Sun at different points along its orbit.
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The principle of Black hole was enunciated by
C.V. Raman
H.J. Bhabha
S. Chandrashekhar
H. Khurana
The principle of Black hole was enunciated by S. Chandrashekhar. A Black Hole is a region of space-time from which gravity prevents anything, including light, from escaping. The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. Around a black hole, there is a mathematically defined surface called an event horizon that marks the point of no return. The hole is called “black” because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics.
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The planet which is called twin sister of the Earth is
Mercury
Venus
Mars
Uranus
The planet which is called twin sister of earth is Venus. Venus is known as the Earth's twin because of its similar size, chemical composition and density. However, due to its toxic atmosphere, Venus is not habitable.
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Who discovered the solar system?
Aryabhatta
Newton
Copernicus
Kepler
Copernicus discovered the solar system. Nicolaus Copernicus was a Renaissance mathematician and astronomer who formulated a heliocentric model of the universe which placed the Sun, rather than the Earth, at the center.
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Which of the following planets is smaller in size than the Earth?
Venus
Uranus
Saturn
Neptune
Venus is smaller in size than the Earth. Diameter of earth is12,742 km while that of Venus is12,100 km
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Time taken by Sun's light to reach Earth is
8 min 18 sec
9 min
9 min 18 sec
6 min 18 sec
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Time taken by Moon's light to reach Earth is
58 sec
1.34 sec
1.58 sec
2.32 sec
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Space between Earth and Moon is known as
Cislunar
Fulalunar
Nebula
None of these
Space between Earth and Moon is known as Cislunar. Pertaining to the space between the earth and the orbit of the moon.
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Which of the following does not belong to solar system?
Asteroids
Comets
Planets
Nebulae
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Which one of the following planets is nearest to the earth?
Mercury
Venus
Mars
Uranus
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Which one of the following conditions is most relevant for the presence of life on mars?
Atmospheric composition
Thermal conditions
Occurrence of ice cap and frozen water
Occurrence of ozone
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Among the following which planet takes maximum time for one revolution around the sun?
Earth
Jupiter
Mars
Venus
Jupiter takes maximum time for one revolution around the sun. Jupiter revolves or orbits around the Sun once every 11.86 Earth years, or once every 4,330.6 Earth days. Jupiter travels at an average speed of 29,236 miles.
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Which planet is called "Evening star"?
Mars
Jupiter
Venus
Saturn
Venus is called the Evening star. Because it trails the Sun in the sky and brightens into view immediately after the Sun sets and when the sky is dark enough. When Venus is at its brightest, it appears visible merely minutes after the Sun has set.
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The Earth becomes minimum distance from the sun?
3rd January
4th July
22nd March
21st September
The Earth shows minimum distance from the Sun on 3rd January.
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Which planet is surrounded by ring?
Saturn
Mars
Venus
Earth
Saturn is surrounded by ring. Saturn has a ring around it because it is believed to be very big and has lots of moons, meaning it has a strong pull of gravity. Another major reason is that the asteroids fling into its orbit and the rings are not solid.
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Lunar eclipse occurs
When moon lies between earth and sun
When earth lies between sun and moon
When sun lies between earth and moon
None of these
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By how much degree the earth is inclined on its own Axis
231/2
661/2
241/2
691/2
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On the surface of the moon
the mass of an object is more but it weighs lesser
the mass and weight both remain unchanged
the mass is the same but the weight is lesser
the mass is more but the weight is lesser
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To a space traveller on moon, the sky in day appears
white
black
blue
red