Question

SPACE AND TIME...

1) DEFINE IN SHORT -
NAKED SINGULARITY
NEUTRINO
NEUTRON STAR

2) DESCRIBE ABOUT EVENT HORIZON IN SHORT.

3) NAME THE NEAREST STAR OF OUR SOLAR SYSTEM.​

Answer 1

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1>> $\bf\underline{Naked \: Singularity \: :}$
A space time Singularity which is not surrounded by a black hole.

$\bf\underline{ Neutrino :}$
An extremely light (possibly massless) elementary matter particle that is affected only by the weak force and gravity.

$\bf\underline{ Neutron \: Star :}$
A cold star, supported by the exclusion principle repulsion between neutrons.


2>> The event horizon is the boundary of the black hole. It is the region of space time from which it is not possible to escape, acts rather like a one way path around the black hole.
The event horizon is the path in space - time of light that is trying to escape from the black hole, and nothing can travel faster than light, even light cannot escape from black hole. It is possible to fall anything through the event horizon into the black hole, but nothing can ever get out of the black hole through the event horizon.


3>> $\bf\underline{Alpha \: Centauri \:}$is the nearest star to our solar system. It is approximately 4.299 light years from Earth.


$\boxed{\bf\underline{Our\: Universe\: is\: the\: biggest\: unsolved\: mystery.}}$

Answer 2

1) In general relativity, a naked singularity is a hypothetical gravitational singularity without an event horizon. In a black hole, the singularity is completely enclosed by a boundary known as the event horizon, inside which the gravitational force of the singularity is so strong that light cannot escape. Hence, objects inside the event horizon—including the singularity itself—cannot be directly observed.

A neutrino is a fermion that interacts only via the weak subatomic force and gravity. The neutrino is so named because it is electrically neutral and because its rest mass is so small that it was long thought to be zero. The mass of the neutrino is much smaller than that of the other known elementary particles

A celestial object of very small radius (typically 30 km) and very high density, composed predominantly of closely packed neutrons. Neutron stars are thought to form by the gravitational collapse of the remnant of a massive star after a supernova explosion, provided that the star is insufficiently massive to produce a black hole.

2) In general relativity, an event horizon is a region in spacetime beyond which events cannot affect an outside observer. In layman's terms, it is defined as the shell of "points of no return", i.e., the boundary at which the gravitational pull of a massive object becomes so great as to make escape impossible.

3)Alpha Centauri.

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