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HOU ToolBox M1 Crab Nebula |
Welcome to http://www.handsonuniverse.org/activities/Explorations/ToolBox/M1CrabNebula
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HOU ToolBox M1 Crab Nebula |
Supernova! 1054AD In 1054 AD, the Chinese and the Native American Indians recorded observations of an extemely bright 'guest star', a supernova. Crab Nebula & Pulsar Now! The supernova faded to a much dimmer star and a nebula of gas and dust appeared. Today with our telescopes we see a fuzzy patch, the Crab Nebula, with a pulsar star nestled inside! |
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| Open m1crab.fts | Click  . Or, click on  , and
then Open. Look in the Toolbox folder. Double click on the icon for m1crab.fts. Or,
click the image icon, then Open. (You may have to go to  and  to  .)
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| Color |  Click . Select a color. Which is your favorite color
palette for the Crab Nebula? _____________ |
| Zoom |  Click inside the
box. Hold down the mouse and sweep over the number. Replace it with a new number like 2 or
3, up to 20. Click  or press Enter or Return
on your keyboard. When you zoom, you may see the pixels. Pixels are 'picture elements'.
What shape are the pixels? ______________________ Please reset zoom to your choice.  |
| Status Bar | Move your cursor over the pulsar  inside the Crab Nebula. Look for the status bar  in the lowest right corner of the
HOU screen. The (x, y) refer to the pixel position of the cursor on the image. Record the
pixel coordinates for the pulsar. x:_______ y:_______. Counts refer to
brightness. |
| Log |  Click in the box
in front of log. Log scales the colors in a way that allows you to see the dim parts of
the image. Do you prefer the log tool on or off? _________ |
| Min / Max |  You can change the contrast displayed in your
image in one of three ways. Click, drag, and release the red or blue tabs. Or, click,
click, click on the arrows. Or, replace the min and max numbers. What are your favorite
settings? min________ max _________ |
| Favorite Settings | For this image, m1crab.fts, record your favorite settings!
min________max________, color __________,  |
Download the image
m1crab.fts.
This image was taken at NOAO, Kitt Peak by Adam Block, on the 16 inch telescope
used in The Advanced Observers Program.
01/16/2000
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