ARE WE ALONE IN THE

GALAXY?

• This presentation was prepared by Pilot Binbaşı Ali Tekin Primary School students as a project work

CONTEXT

• EXOPLANETS

• ARE WE ALONE

• CONSTELLATIONS

• 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.

Some exoplanets are larger than our Earth. One day, scientists hope to discover small, Earth-like planets around other star.

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.

• 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 .

• Morever hundreds of extrasolar planets have been found .

• Perhaps,simple life, such as bacteria, may still exist deep underground.

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.

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.

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.

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.

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