How are the planets and stars formed????Powerpoint on formation of stars and planets.

2.  A celestial body moving in an elliptical orbit round a star is known
an a planet.
 A star is a luminous sphere of plasma held together by its own
gravity.

3. HOW DO PLANETS
AND STARS FORM??

4. The planets in our Solar System are
believed to have formed from the same
spinning disc of dust that formed the Sun.
This disc, called the , was
composed mainly of hydrogen and
helium.
Particles in the spinning disc began to
clump together as gravity attracted them
to each other. Over a few million years
many of these chunks had merged
together and there were objects

5. Over time the planetesimals continued to
collide and join together, attracted by
gravity.These larger objects, about the
size and mass of our Moon, are
called .The accumulation of
material to form planets in this way is
called .

6. Stars form inside relatively dense
concentrations of interstellar gas
and dust known as molecular
clouds.These regions are
extremely cold.At these
temperatures, gases become
molecular meaning that atoms
bind together.

8. The Sun is a star.

9. How many planets in the solar system have rings?
Jupiter, Saturn, Uranus, and Neptune all have rings.

10. What is the name of our galaxy?

11. Who am I?
I am the smallest particle of chemical
element that can exist.

12. What are the gases found in a planet?