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WorksheetsTesseract
Total questions: 26
Worksheet time: 14mins
Two stars (A and B) are observed to have the same brightness. Star ‘A’ is at a greater distance than the other. What inference could you make on the absolute magnitude of stars A and B?
Absolute magnitude of A is more than B
Absolute magnitude of A is less than B
Absolute magnitude of A is equal than B
None of the above
There is no nuclear fusion reaction in Neutron Stars, but still they don't collapse under gravity under if their mass is less than TOV limit. Why??
(more than one option is correct)
Pauli's Exclusion Principle
Radiation Pressure
Electron Degeneracy Pressure
Outward pressure by Nucler Fusion
Repulsion by Strong Nuclear Force
In the CNO (Carbon - Nitrogen - Oxygen) nuclear fusion cycle of a star, what element(s) is fused to produce what element?
Carbon→Oxygen→Nitrogen
Carbon→Nitrogen→Oxygen
Helium → Hydrogen
Hydrogen → Helium
The most prominent multi-messenger that is produced in a core collapse supernova is
EM waves
Gravitational waves
Neutrinos
Cosmic Rays
According to Schwarzschild, if the Sun was compressed suddenly to a radius of 3km, what would it become?
(a)
If the radius of a star increased 100 times, then luminosity will increase by ____
× 100
× 1000
× 10
× 10000
If Andromeda and Milkyway galaxies collide, will any star collide with any other star?
Yes
No
An EM wave is emitted from the surface of a stationary neutron star perpendicularly. What will be the frequency of the EM wave as observed by a stationary observer who is appreciably outside the gravitational field of the neutron star?
Frequency will decrease
Frequency will increase
Frequency remains the same.
None of the above
A star has the pulsating brightness as shown in the graph. Name the technical term for the type of star.
Pulsating star
Super Blue giant stars
Cepheid Variables
Binary Star
The density of Normal matter in our universe is approximately _____ protons per cubic meter.
2
4
6
3
What is that mass limit for an interstellar gas cloud to become a protostar named?
Jupiter Mass
Jeans Mass
0.8 Solar Mass
None of the above
Why is Iron 56 the last nuclei a star can fuse?
(more than one answer is correct)
Iron 56 has the least binding energy per nucleon
Iron 56 has the highest potential energy
Iron 56 is highly stable nuclei
Iron 56 has the highest binding energy per nucleon
What should the direction of the acceleration with respect to its motion be for a relativistic particle to emit synchrotron radiation?
Perpendicular
Parallel
At an angle of 45 degrees
Opposite direction
What is the biggest supercluster in which the Milky Way galaxy is present?
Virgo
Laniakea
Orion
Saggitarius
What is that structure called where the compact region at the center of a galaxy will be highly luminous?
Blackhole
Quasar
Active Galatic Nuclei
Saggitarius A*
If the sun was replaced by a black hole with the mass of 1 Solar mass whose size of the event horizon is the same as that of the sun, will it affect the trajectory of any stable orbit of any orbiting object in the solar system?
Yes
No
In the past, the absolute magnitude of every astronomical object was calculated with reference to which astronomical object?
Altier
Sirius
Vega
Sun
What is the anomalous property in the mercury's orbit?
Precession
Time period of revolution
Distance to Sun
All of the above
What are the sources of helium?
Big Bang
Nucleosynthesis
Nuclear Fusion
Alpha Decay
All of the Above
Binary revolving blackholes can create _____ waves because of the change in the mass _____ moment in time.
EM waves - Dipole
EM waves - Quadrupole
Gravitational waves - Dipole
Gravitational waves - Quadrupole
Are all the four multi-messengers of astronomy produced during a supernova?
Yes
No
The relativistic jet particles spewing out of the black hole are actually coming from what part of the black hole?
Accretion Disk
Event Horizon
Innermost Circular Stable Orbit
None of the Above
The outermost part of the sun that has a very high temperature is called ______
Photosphere
Chromosphere
Corona
Sun spots
On which of the following planets of the solar system does the sunrise in the west and set in the east?
Saturn
Mars
Jupiter
Venus
What type of radiation does the James Webb Space telescope use?
Radio waves
Infrared
Visible light
Ultraviolet
Pick the Odd One Out
Pillars of Creation
Cartwheel Galaxy
Stephan's Quintet
WASP 96 B
