(50) Universe Flashcards
Halley’s Comet appears once in a period of
76 Years
Jupiter is larger than the earth by about
11 times
Lunar eclipse occurs on
Full moon
The hottest planet
Venus
Distance of earth and the sun in Million Kms is
149
A terrestrial planet is a planet of
A dense, rocky body
The planet having 27 moons
Uranus
the orbits of planets around the sun, or of sattelites around the earth can be
Circular and Elliptic
Fastest Planet
Jupiter
____ and ____ has no satellites
Mercury and 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
The outermost layer of the sun is called
Corona
____ planet have the largest number of satellite in the solar system
Jupiter
The Radiant energy of the sun is transmitted in the form of
Short Waves
The planet that lies at the outermost orbit of the solar system is
Neptune
___ planet is the largest of inner planets
Earth
Tides are highest
when the sun, moon and earth are in line
Asteriods have their orbit b/w the planets
Mars and Jupiter
Year is longest on
Mercury
The bright heavenly body with a long luminous tail is called
A comet
The first satellite was launched by
USSR
___ planet takes the largest time to go once around the sun
Neptune
Black Hole?
- A body in space
- does not allow any radiation to come out
- this property is due to its Very Hight Density.
Evening Star?
Venus
Earth’s rank in term of size in solar system
5th
The planet with the shortest rotation time around its axis is
Jupiter
The planets are kept in motion in their respective orbits by the
Gravitation and centrifugal forces
Big Bang theory
- An explosion about 10 to 15 billiion years ago
- Most astronomers believe to be the origin of the Universe
Operation Path Finder was the mission to
Mars
Black Holes are stellar objects which
Have intense gravitational field
How may satellites of saturn planet
56
acc to wikipedia it has 62 moons out of which 53 are named
____ and ____ planets appear as ‘Morning Star’ in the eastern sky and ‘Evening Star’ in the western sky
Mercury and Venus
____ planet contain largest quantity of Carbon Dioxide 95%
Venus
____ Planet reflects back to space the highest percentage of light it recives from sun
Venus
___ planet takes nearly same time for a rotation on its own axis as the does the earth
Jupiter
The only planet in the solar system which rotates on its own axis from East to West is
Uranus
Why saturn is Unique in Solar System?
There is a well developed system of rings around it
Biggest star in our galaxy
Proxima Centauri
After Ibn Zubair; who observed the sun spots?
Galileo
Sun Spots?
- Cooler areas which move about on the Sun’s surface and show up as dark spots
A light Year, as a unit of measurement of distances of heavenly bodies, is equal to
9 1/2 million kms
Neptune takes ____ years to orbit around the sun
165 years
Visible part of the sun is called
Photosphere
Galileo discovered the saturn rings in
1610
____ was the first to speculate that Venus is completely covered with clouds
Christian Huygens
____ was first to determine that the day on the Mars was roughly 24hrs long
Giordano Burno
How long does a Sun-ray take to travel from the sun to the earth
498 Sec
-8min 20sec
Stars which appear single to the naked eye but are double stars when observed by a telescope, are known as
Bindaries
Acc to scientific research water is presend on the surface of _____ except earth planet
Mars
