THIS PPT IS ALL ABOUT SPACE AND ALL YOU NEED TO KNOW

1. Space
B Y S A H A S R A S I R I N

2. What is space
• Space is the boundless three-dimensional extent in which objects and events
have relative position and direction. Physical space is often conceived in three
linear dimensions, although modern physicists usually consider it, with
time, to be part of a boundless four-dimensional continuum known as
spacetime

3. What does space contain
• Outer space is not completely empty—it is a hard vacuum containing a low
density of particles, predominantly a plasma of hydrogen and helium, as
well as electromagnetic radiation, magnetic fields, neutrinos, dust, and
cosmic rays.

4. Does space have star
• Stars are not scattered randomly through space, they are gathered together
into vast groups known as galaxies. The Sun belongs to a galaxy called the
Milky Way. Astronomers estimate there are about 100 thousand
million stars in the Milky Way alone. Outside that, there are millions upon
millions of other galaxies also!

5. What does galaxy mean
A galaxy is a huge collection of gas, dust, and billions of stars and their solar
systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also
has a supermassive black hole in the middle. ... Some scientists think there
could be as many as one hundred billion galaxies in the universe.

6. What is at the centre at the milky way
• The Galactic Center is the rotational center of the Milky Way galaxy; it is a
supermassive black hole of 4.100 ± 0.034 million solar masses, which
powers the compact radio source Sagittarius A*.

7. How many galaxies are there in
universe
• The deeper we look into the cosmos, the more galaxies we see. One 2016 study
estimated that the observable universe contains two trillion—or two million
million—galaxies. Some of those distant systems are similar to our own
Milky Way galaxy, while others are quite different.

8. where is our solar system located in the
milky way galaxy
• Orion Arm
• The Solar System is located at a radius of about 27,000 light-years from
the Galactic Center, on the inner edge of the Orion Arm, one of the spiral-shaped
concentrations of gas and dust. The stars in the innermost 10,000 light-years
form a bulge and one or more bars that radiate from the bulge.
• In the next slide you will see few examples
•

9. Examples
A N D R O M E DA G A L A X Y W H I R L P O O L G A L A X Y

10. Examples
B L A C K E Y E G A L A X Y M I L K Y W A Y

11. Triangulum Galaxy

12. Thank you everyone
By Sahasra siri N