Two stars of different galaxies in the universe move away from each other. Sometimes, two stars of different galaxies may move towards each other in course of time.Which of the following inferences can be drawn from the observation?
Stars repel each other.
Stars attract each other.
Galaxies are expanding.
Galaxies are contracting.
Sun has nine planets . Which is the largest among all of them ?
Neptune
Jupiter
Earth
Saturn
The central part at which numerous stars are concentrated is called
Supernova
Perihelion
Galactic bulge
Apastron
Stars are formed in
Ceres
Nebula
Andromeda
None of these
According to Big Bang theory, all the celestial objects existed at a certain point which is
expanding into the present day universe
contracting into the present day universe
located in the middle of the Milky Way
located in the middle of the Solar System
The outer surface of the Sun visible to us is
chromosphere
photosphere
corona
convection zone
In stars , the hydrogen nuclei convert into helium nuclei by _________ reaction.
Nuclear fission
Mutation
Nuclear fusion
Electron transition
The force of gravity is____ force that is ______ proportional to the ______ of the distance between the two given masses.The information in which alternative completes the given statement?
a repulsive, inversely , square
a repulsive, directly, cube
an attractive, inversely , square
an attractive, directly , cube
A njattuvela is approximately ......days.
10 - 11
12 - 13
13 - 14
none of these
The star nearest to the Earth after the Sun is
Regel
Sirius
Betelguesse
Proxima Centauri
