Nebulae are giant clouds of dust and gas found in space where stars are formed. They can be light years across and look fuzzy in appearance. When the gas and dust in a nebula collapses under its own gravity, it forms hot, dense cores where stars ignite and shine. Some nebulae glow due to radiation from young stars, called emission nebulae. Others reflect the light of stars, known as reflection nebulae. Planetary nebulae are formed when aging stars blow off their outer layers.

1. Ever wondered where stars are made? Well, now you are about to
find out! Just where these hot balls of gas start their lives begins in
what astronomers call a nebula (plural: nebulae) and they are
basically the nurseries of the Universe.
PRIMARY SCHOOL "VASIL APRILOV" - RUSE
DIVE IN THE SKY

3.  For one, a nebula is a gigantic cloud of
dust and gas; mainly of hydrogen and
helium gases, and they can be light years
across - that’s trillions of miles - imagine
how many nurseries you can fit into one of
these ginormous star factories! Secondly,
they look quite fuzzy in appearance -
pretty much like fluffy clouds or cotton
wool in the sky.

5.  Nebulae come in not just a variety of sizes,
they also come in a range of shapes with
some of them looking very much like
anything from horses (the Horsehead
Nebula) to crabs (the Crab Nebula). The
massive question is though, how do they
form or have they always been there?
What do you think?

6.  When it comes to making stars, astronomers believe that
nebulae are made from the huge collapse of gas in what
they refer to as the Interstellar Medium (the gas, dust and
cosmic rays that can be found between planets and stars
in galaxies). As the material falls in on itself under its own
weight, large stars are made in the centre. When this
happens, ultraviolet radiation shoots out like a laser
beam and the nebula is lit up - just like a Christmas tree!
Astronomers have a name for these types of nebulae –
“EMISSON NEBULAE”

8.  An emission nebula is a nebula formed of ionized gases
that emit light of various colors. The most common
source of ionization is high-energy photons emitted from
a nearby hot star.

10.  Sometimes, stars do not have enough pent-up energy to
zap their surroundings with high energy particles. So they
happily sit in clouds of dust and these clouds reflect their
light. This light is reflected and that’s pretty much what
happens in a reflection nebula.

12. That’s not the end of our tour of nebulae -
there’s more!
Last but not least there’s planetary nebulae -
but do not be fooled - these shells of gas have
absolutely nothing to do with planets!
This type of nebula earns its name because
some astronomers of the 18th Century believed
that they looked like giant worlds through the
eyepiece of small telescopes.

13. Planetary nebulae are made when a star runs out of fuel
to burn. What happens next is amazing. It’s not quite the
same as when your car runs out of gas, where it stops
moving - what happens to a star is quite a bit different; it
blows off its outer layers of gas in the shape of a ring or
bubble. When stars do
this, astronomers say
that a star is dying. But
it’s not a sad ending for
the star, it’s a beautiful
colorful one!

15. NEBULA AND STAR BIRTH

17. PREPARING…

18. We watched our Turkey`s
friends activities and we did
it…

20. WE HAD A LOT OF FUN!

22. https://en.wikipedia.org/wiki/Nebula
https://en.wikipedia.org/wiki/Emission_nebula
https://en.wikipedia.org/wiki/Planetary_nebula
https://en.wikipedia.org/wiki/Reflection_nebula