1. CONSTELLATIONS AND MORE STAR STUFF
                

2. than appear to be together but
From here on earth, they all look the same distance. In fact, ancient people thought they were all “stuck” on a glass sphere.
A constellation is
a group of stars
than appear to be together but
are not.

3. Orion the hunter
The constellation looks flat but all the stars are at different distances from us.

4. Betelguese (Red Supergiant) - If Betelgeuse were at the center of the Solar System, its surface would extend past the asteroid belt, wholly engulfing the orbits of Mercury, Venus, Earth, Mars, and possibly Jupiter.
It will explode as a Supernova within the next million years.

5. The Zodiac is a special group of constellations that extend out from Earth’s equator.

6. Can you connect the stars to form the constellation. This is Scorpio
Can you connect the stars to form the constellation? This is Scorpio. (Clue = 16 stars)

8.                                              
Scorpio

9. To measure the distances in space, astronomers use a light year.
A light year is the DISTANCE light travels in one year. One light year is equal to a little under 6 trillion miles! (6,000,000,000,000)
Proxima Centauri is the closest star to our solar system. It is about 4 light years away. Going the speed of light it would take us 4 years to get there.
Traveling as fast as the average spaceship, it would take between 70,000 and 100,000 years to get there!

10. Supergiant
Giant
Medium sized
White dwarf
Neutron star
Star sizes

11. Life cycle of our sun We are now here
Our sun will run out of energy and it will be finished too. But this will not happen for another 5 billion years!

12. Comparison of our sun with a white dwarf and a neutron star.

13. In a red supergiant, hydrogen shells expand, and the sun loses heat
In a red supergiant, hydrogen shells expand, and the sun loses heat. The now cooler star takes on a red color. They are the largest known stars.
Neutron stars are the smallest and densest stars known to exist Though neutron stars typically have a radius on the order of 10 kilometres (6.2 mi), they can have masses of about twice that of the Sun.
A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.

15. Star color Determined by surface temperature.
Hottest are blue – coolest are red.

16. Light Pollution!
Many of us live in a world of urban constellations, unable to see the stellar constellations a moderately dark sky would provide. The ongoing loss of a dark night sky for much of the world’s population is a growing, serious issue that impacts not only astronomical research, but also human health, ecology and ecosystems, safety and security, and energy conservation. Up to $10 billion dollars is wasted each year in the United States by lighting up the underbellies of birds and clouds.

17. In particular, light pollution has a negative influence on a variety of animals and plants in a variety of ways. It has been shown to disorient animals. Light pollution affects mating, alters predator-prey behavior, confuses migration, and influences animal physiology. Effects have been observed over a full range of taxonomic groups, including birds, reptiles, mammals, amphibians, fishes, invertebrates, and plants. Here in particular we will discuss the effects of nighttime artificial lighting on sea turtles, birds, frogs, salamanders, insects, plants and fish.
For billions of years, all life has relied on Earth’s predictable rhythm of day and night. It’s encoded in the DNA of all plants and animals. Humans have radically disrupted this cycle by lighting up the night.