4. • Exoplanets are planets beyond our
solar system. Many of these
planets are too far away that we
can’t see or photograph them.
Scientists have discovered more
than 500 planets in our galaxy since
1995.
5. Some exoplanets are
larger than our
Earth. One day,
scientists hope to
discover small,
Earth-like planets
around other star.
6. ARE WE ALONE ?
• Scientists have been
trying to find its
answer. But no one
knows. The searches
continue in hopes of
finding.
• Are we alone in the
galaxy? This question
has been asked since
ancient times.
7. • They hope that life
may start in Mars if it
has enough warm
and wet. The surface
is too cold and dry to
support life. Morever
hundreds of
extrasolar planets
have been found .
8.
9.
10. • Morever hundreds of extrasolar planets
have been found .
• Perhaps,simple life, such as bacteria, may
still exist deep underground.
11. CONSTELLATIONS
• In the past, people observed sky at nights
and saw a group of stars that form a
shape or pictures with imagination and
awe.Today we call constellation. People
used them for different aims.
12. CONSTELLATIONS
• First aim is to know
seasonal changes.So
they could plan when
they could plant their
crops. For example
when the constellations
lined up in their view,
they knew that it was
time for spring or
winter.
13.
14.
15. CONSTELLATIONS
• The other purpose was to navigate and these
images helped them find the correct
navigational stars.Lastly, some
constellations have a myth and ancient
people used constellation myths to explain
the constellations and teach moral values.
All cultures see different star patterns
although they look at the same
constellations.
16. CONSTELLATIONS
• So Greek, Chinese, Japanese and
Egyptian people have their different own
stories for the pictures in the night sky.
These stories passed from one generation
to another.
17. CONSTELLATIONS
• Now, the societies changed and
progressed because of better technology
and telescopes. The International
Astronomical Union accepted 88
constellations officially in 1925.Some most
popular constellations are the Big Dipper
and the Little Dipper
