Astro Unit 4                           Light

The Light of Stars
by Henry Wadsworth Longfellow

The night is come, but not too soon;
And sinking silently,
All silently, the little moon
Drops down behind the sky.

There is no light in earth or heaven
But the cold light of stars;
And the first watch of night is given
To the red planet Mars.

Is it the tender star of love?
The star of love and dreams?
O no! from that blue tent above,
A hero's armor gleams.

And earnest thoughts within me rise,
When I behold afar,
Suspended in the evening skies,
The shield of that red star.

O star of strength! I see thee stand
And smile upon my pain;
Thou beckonest with thy mailed hand,
And I am strong again.

Within my breast there is no light
But the cold light of stars;
I give the first watch of the night
To the red planet Mars.

The star of the unconquered will,
He rises in my breast,
Serene, and resolute, and still,
And calm, and self-possessed.

And thou, too, whosoe'er thou art,
That readest this brief psalm,
As one by one thy hopes depart,
Be resolute and calm.

O fear not in a world like this,
And thou shalt know erelong,
Know how sublime a thing it is
To suffer and be strong.
 

See Explanation.  Clicking on the picture will download
 the highest resolution version available.
 

Globular Cluster M3
Credit & Copyright: S. Kafka & K. Honeycutt (Indiana University), WIYN, NOAO, NSF

Click to link to this week's journal, the Globe at Night observations!

 

Capturing Photons

 These links contain useful

 explanations:

       
Find your "birthday star"!
http://outreach.jach.hawaii.edu/birthstars/index.html

Variable stars

Distance measurements in space

Image processing using Photoshop

How to take astrophotos

Astrophotography with digital cameras

SBIG- explaining CCD cameras
Michigan Dark Sky Association
Dark Skies Locator
The Night Sky in the World
Jim Terry's Street Lighting Home Page
International Dark Sky Association
Anatomy of the eye

Kepler launch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  The Kepler Space Telescope successfully lauched on March 7.
 

 
NASA March Madness is here!  Choose your mission selections for the first round!
 

What's Up?

Saturn is now visible in the evening sky- it will remain with us
 for the rest of the semester.

NASA  has a nice news page, as does the Hubble Space Telescope.

Enter the NASA Art contest.

There are still some astronomy lectures remaining on these scheules in Ann Arbor:

The University of Michigan's "Saturday Morning Physics" .

 Astronomy lecture series  and Eyes on the Universe


On the Kepler web site (link at left under the picture) you can download a podcast explaining how this mission intends to find earthlike planets.

 

Reading Topics (text):
Nature of light
Magnitude
CCD's and Image Processing
Seeing
Inverse-square law
Distance measurements
    (more distance measurements)

Text pages:
White
                           Black
 45-49                           52-56
   285-87                        282-84
  86-87                           89-90
  82-83                           87-88
  35-36, 284-85              43-44
                7-11, 280-81,                 21-23, 354-55  
                427-28, 439-41             389-90, 417-28
 

Other links of interest:
AAVSO
APOD
HOU- Hands-On Universe Image Archive
Travis Rector's site (pretty pictures)                        Travis-->
Clear Sky Clock for Grosse Pointe
Minima of Algol calculator