Wednesday, December 17, 2008

The Moon Mineralogy Mapper shows the Moon in a new light.




JPL has just posted some images captured by the Indian Space Research Organization's Chandrayaan-1 spacecraft.

The pair of images above is an image released by JPL based on Moon Mineralogy Mapper data for the Orientale region. The left image strip is a color composite of data from 28 separate wavelengths of light reflected from the moon. The blue to red tones reveal changes in rock and mineral composition, and the green color is an indication of the abundance of iron-bearing minerals such as pyroxene. The right image strip of the pair is from a single wavelength of light that contains thermal emission, providing a new level of detail on the form and structure of the region's surface.

The final image is the result I got by merging the first two images. The result is that one can more easily associate the colors with geological features.

Monday, December 1, 2008

Inverted Text Demystified

The Extended ISO 8859 characterset has nearly all of the inverted Latin small letters with a few exceptions which enables one to create inverted text messages for a comic effect. The special characters are designated by a character entity such as ð for the letter ð or "eth". And the string of characters pɔqɐ will produce the text "pɔqɐ" which is "abcd" inverted. Using the same method one can produce a line of inverted text,
¡ƨɪɥʇ pɐǝɹ oʇ pɐǝɥ ɹnoʎ uo puɐʇƨ oʇ ǝʌɐɥ ʎɐɯ noʎ

(The blogger HTML editor was used to convert the code to the inverted text.)

letterchr
num
result
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
592
113
596
112
477
607
595
613
618
638
670
1503
623
117
111
100
98
633
424
647
110
652
653
120
654
122
ɐ
q
ɔ
p
ǝ
ɟ
ɓ
ɥ
ɪ
ɾ
ʞ
ן
ɯ
u
o
d
b
ɹ
ƨ
ʇ
n
ʌ
ʍ
x
ʎ
z