March 26, 2014 In your journal, title it “Name that Galaxy” # 1-8. Get with your partner (s) from yesterday and decide if the picture represents: Spiral Shaped Galaxy Elliptical Shaped Galaxy Irregular-Shaped Galaxy

Science Journals Please draw this diagram into your journal.

The Dark Horsehead Nebula Arne Henden, US Naval Observ., Flagstaff, Image Processed by Al Kelly IMAGES FROM ASTRONOMY TRANSPARENCIES The Dark Horse Head Nebula

The Witch Head Nebula Gary Stevens IMAGES FROM ASTRONOMY TRANSPARENCIES The Witch Head Nebula

The Rosette Nebula T. A. Rector, B. Wolpa, M. Hanna (AURA/NOAON/NSF) IMAGES FROM ASTRONOMY TRANSPARENCIES The Rosetta Nebula

The Crab Nebula from VLT FORS Team, ESO IMAGES FROM ASTRONOMY TRANSPARENCIES The Crab Nebula from VLT

AVERAGE STARS Average Stars form from a nebula. They produce their own heat and light by nuclear reactions. These stars live for billions of years before becoming a red giant.-

AVERAGE STAR…. Our Sun

RED GIANT Before the end of life of an average star, it swells up into a red giant before losing its outer layers in an explosion that creates a planetary nebula. A planetary nebula is NOT the same thing as a stellar nebula. A planetary nebula is near the end of an average star’s life, before it turns into a white dwarf.

PLANETARY NEBULA A planetary nebula is NOT the same thing as a stellar nebula. A planetary nebula is near the end of an average star’s life, before it turns into a white dwarf.

Planetary Nebula

Planetary Nebula: Helix Nebula

WHITE DWARF White Dwarfs are small and hot and are the shrunken remains of an average size star. Their nuclear energy supplies have been used up, and this is the last stage of the life cycle.

Artist’s Depiction of White Dwarf passing in front of a small red star

Cocoon of a New White Dwarf

Dragonfish Nebula This infrared image from NASA's Spitzer Space Telescope shows the nebula nicknamed 'the Dragonfish.' This turbulent region, jam-packed with stars, is home to some of the most luminous massive stars in our Milky Way galaxy

MASSIVE STAR Massive stars are the brightest stars that form from a nebula. They are white or blue in color. They can have masses times that of the Sun (1 solar mass), but they live for less than a million years.

MASSIVE STAR An image of the Wolf-Rayet star R136a1, the most massive star known

RED SUPERGIANT When a massive star has used up all of its nuclear energy, it swells up to 1000 times the diameter of the Sun.

SUPERNOVA When gravity overcomes the nuclear energy in a red supergiant, the star begins to collapse, leading to a massive explosion that can remain visible for months.

NEUTRON STAR

BLACK HOLE Sagittarius A* is the black hole at the center of the Milky Way galaxy.

Life Cycle of a Star

Note down this definition -

Our Sun →