Loading…

Flash Player 9 (or above) is needed to view presentations.
We have detected that you do not have it on your computer. To install it, go here.

Like this presentation? Why not share!

Semanario celeste 26 noviembre

on

  • 708 views

Semanario celeste a partir del 21 de noviembre

Semanario celeste a partir del 21 de noviembre

Statistics

Views

Total Views
708
Views on SlideShare
685
Embed Views
23

Actions

Likes
0
Downloads
0
Comments
0

1 Embed 23

http://www.astronomos.org 23

Accessibility

Categories

Upload Details

Uploaded via as Apple Keynote

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • <br />
  • http://1.bp.blogspot.com/_fXzRYbEw4hA/TClhYBhpuPI/AAAAAAAADgM/Zb9vxbzhTsQ/s1600/epoxi%2Bcometa.jpg <br /> <br /> Data collected by Deep Impact&apos;s onboard infrared spectrometer show without a doubt that the particles are made of frozen H2O, i.e., ice. Chunks consist of micron-sized ice grains loosely stuck together in clumps a few centimeters to a few tens of centimeters wide. <br />
  • http://upload.wikimedia.org/wikipedia/commons/thumb/d/d4/Mexico_states_map.png/550px-Mexico_states_map.png <br />
  • http://www.tssphoto.com/wp-content/uploads/2009/11/earth-north-america-space_900px.jpg <br />
  • <br />
  • http://science.nasa.gov/science-news/science-at-nasa/2010/18nov_cometsnowstorm/ <br /> This contrast-enhanced image obtained during Deep Impact&apos;s Nov. 4th flyby of Comet Hartley 2 reveals a cloud of icy particles surrounding the comet&apos;s active nucleus <br /> Snowstorm Engulfs Hartley 2 <br /> Nov. 18, 2010:&#xA0; NASA has just issued a travel advisory for spacecraft: Watch out for Comet Hartley 2, it is experiencing a significant winter snowstorm. <br /> Deep Impact photographed the unexpected tempest when it flew past the comet&apos;s nucleus on Nov. 4th at a distance of only 700 km (435 miles). At first, researchers only noticed the comet&apos;s hyperactive jets. The icy nucleus is studded with them, flamboyantly spewing carbon dioxide from dozens of sites. A closer look revealed an even greater marvel, however. The space around the comet&apos;s core is glistening with chunks of ice and snow, some of them possibly as large as a basketball. <br /> We&apos;ve never seen anything like this before," says University of Maryland professor Mike A&apos;Hearn, principal investigator of Deep Impact&apos;s EPOXI mission. "It really took us by surprise." <br /> Before the flyby of Hartley 2, international spacecraft visited four other comet cores&#x2014;Halley, Borrelly, Wild 2, and Tempel 1. None was surrounded by "comet snow." Tempel 1 is particularly telling because Deep Impact itself performed the flyby. The very same high resolution, high dynamic range cameras that recorded snow-chunks swirling around Hartley 2 did not detect anything similar around Tempel 1. <br /> "This is a genuinely new phenomenon," says science team member Jessica Sunshine of the University of Maryland. "Comet Hartley 2 is not like the other comets we&apos;ve visited." <br /> The &apos;snowstorm&apos; occupies a roughly-spherical volume centered on Hartley 2&apos;s spinning nucleus. The dumbbell-shaped nucleus, measuring only 2 km from end to end, is tiny compared to the surrounding swarm. "The ice cloud is a few tens of kilometers wide--and possibly much larger than that," says A&apos;Hearn. "We still don&apos;t know for sure how big it is." <br /> Data collected by Deep Impact&apos;s onboard infrared spectrometer show without a doubt that the particles are made of frozen H2O, i.e., ice. Chunks consist of micron-sized ice grains loosely stuck together in clumps a few centimeters to a few tens of centimeters wide. <br />
  • <br />
  • <br />
  • <br />
  • http://www.5731c.com/image/38122671.jpg <br />
  • http://www.spanish.xinhuanet.com/spanish/2009-03/01/xin_fec5dca350a248969067ad8ded64ea42.jpg <br />
  • http://1.bp.blogspot.com/_IP-xhn2P2rQ/TKc9rFBvcrI/AAAAAAAAFo0/qEO8xvjaDqo/s1600/1.JPG <br />
  • <br />
  • http://2.bp.blogspot.com/_b1AE8x4eLKI/S8TQzlPVOhI/AAAAAAAAT0g/TgmPQJgELDM/s1600/xin_3820407101857500017911.jp <br /> http://3.bp.blogspot.com/_b1AE8x4eLKI/S8TT8X2XXXI/AAAAAAAAT04/KczrjegSRMg/s1600/2007040109035496457.jpgg <br />
  • <br />
  • <br />
  • http://upload.wikimedia.org/wikipedia/commons/4/42/LRO_(2007)_3.jpg <br />
  • <br />
  • http://picasaweb.google.com/lh/photo/8WbmL6_jzfBm7fvDHP6GDQ?feat=embedwebsite <br />
  • <br />
  • <br />

Semanario celeste 26 noviembre Semanario celeste 26 noviembre Presentation Transcript

  • SEMANARIO
CELESTE 26
DE
NOVIEMBRE
  • FOTO
DE
LA
SEMANA
  • La
sonda
EPOXI
(previamente
conocida
como
Deep
Impact)
tuvo
un
 encuentro
cercano
con
el
cometa
Hartley
2
el
4
de
noviembre
de
2010
  • La
distancia
mínima
de
“sobrevuelo”
entre
el
cometa
y
EPOXI
 fue
de
apenas
700
Km
(distancia
a
escala)
  • Es
más
o
menos
la
distancia
entre
Monterrey
y
León,
Guanajuato
  • Nunca
se
había
observado
un
cometa
tan
acOvo
como
éste
  • A
medida
que
se
acercó
el
EPOXI
reveló
los
chorros
sublimados
de
 dióxido
de
carbono
  • Además,
resultó
que
el
cometa
está
envuelto
en
una
nube
de
 fragmentos
de
hielo
y
nieve,
algunos
de
hasta
30
cm
de
diámetro.
  • El
cometa
mide
2
Km
de
diámetro,
y
la
imagen
de
la
semana
muestra,
 por
vez
primera,
la
“tormenta
de
nieve”
que
rodea
a
un
cometa 2K m
  • La
nube
de
hielo
Oene
cuando
menos
30
km
de
diámetro Los
espectrómetros
del
EPOXI
revelaron
que
–sin
lugar
a
dudas‐
 se
trata
de
agua
congelada.
  • En
otros
rumbos…
  • El
artefacto
chino
que
orbita
a
la
Luna,
llamado
 Chang’E
2
ha
enviado
las
primeras
imágenes
de la
superficie
de
la
Luna.
  • La
sonda
fue
lanzada
el
2
de
octubre
de
2010
desde
la
rampa
LC2
del
 Centro
Espacial
de
Xichang,
en
Sichuan
  • La
misión
durará
6
meses
y
orbitará
desde
una
distancia
de
apenas
15
 Km
sobre
la
superficie
lunar.
  • El
objeOvo
principal
es
encontrar
el
siOo
ideal
para
el
alunizaje
del
 Chang’E‐3
en
el
2013:
un
carrito
robot
que
explorará
el
suelo.
  • Esta
imagen
fue
tomada
cerca
del
polo
lunar,
desde
una
distancia
de
 18.7
km
el
pasado
28
de
octubre,
apenas
4
días
después
del
 lanzamiento
de
la
sonda.
  • La
resolución
de
las
imágenes
es
sobresaliente:
apenas
1.3
m
x
pixel
 (superando
así,
la
resolución
de
su
predecesora,
la
Chang’E
1)
  • En
comparación,
el
Lunar
Reconnaissance
Orbiter
de
la
NASA
Oene
una
 resolución
de
1
metro
por
pixel.
  • Otras
imágenes
publicadas
 corresponden
a
Sinus
Iridum
 (Bahía
del
Arcoiris)
  • Al
final
de
la
misión,
Chang’E
2
también
terminará
por
impactar
la
Luna. La
siguiente
imagen
es
un
detalle
del
recuadro
  • PRÓXIMO
SÁBADO
27
DE
NOVIEBRE TEMA
Vislumbrando
el
futuro
distante:
 Cosmología
del
fin
de
los
Jempos