Tribute to the Great Hubble Tele

It was launched into space in 1990. It was are best tool for probing
the universe,with its 94 inch mirror. The mirror is small as compared
with Earth's telescopes,but it more than made up for it being outside
the Earth's atmosphere. It showed us dust storms on Mars. Blackholes
in galaxies and objects at what could be at the very edge of our
universe. My country has no space craft,or money to service the Hubble.
We have no new Hubble 2 in the making. We have no new safe space craft
in the making. Are greatest eye in the sky we let go blind. We have a
president that needs more intelligence Bert

"Are greatest eye in the sky we let go blind."

A very moving tribute. Thank you for sharing.

Sincerely,

Lauksna ^_^


"G=EMC^2 Glazier" wrote in message
...
It was launched into space in 1990. It was are best tool for probing
the universe,with its 94 inch mirror. The mirror is small as compared
with Earth's telescopes,but it more than made up for it being outside
the Earth's atmosphere. It showed us dust storms on Mars. Blackholes
in galaxies and objects at what could be at the very edge of our
universe. My country has no space craft,or money to service the Hubble.
We have no new Hubble 2 in the making. We have no new safe space craft
in the making. Are greatest eye in the sky we let go blind. We have a
president that needs more intelligence Bert

G=EMC^2 Glazier wrote:
the Hubble. We have no new Hubble 2 in the making. We have no new
safe space craft in the making.

Not quite true Bert, take a look at

http://ngst.gsfc.nasa.gov/



DaveL

On Wed, 04 Feb 2004 15:07:05 +0000, Dave wrote:

G=EMC^2 Glazier wrote:
the Hubble. We have no new Hubble 2 in the making. We have no new safe
space craft in the making.

Not quite true Bert, take a look at

http://ngst.gsfc.nasa.gov/



DaveL

You can hardly call the "JWST" a "Hubble II".

Jwst is (From link you supplied):

Begin quote

JWST is a large, infrared-optimized space telescope. It will have an
18-segment, 6.5-meter primary mirror and will reside in an L2 halo orbit.
JWST is scheduled for launch in 2011.

End quote

Note: infrared. In fact nothing _but_ infrared.

Hubble, on other hand, from the following url:
( http://www.nasa.gov/missions/deepspa...eature_05.html ) -

Begin quote

A VERSATILE TELESCOPE

Other orbiting observatories have probed the secrets of space, but Hubble
is the largest and most versatile. Its visible-light camera -- called the
Wide Field and Planetary Camera 2 -- has consistently delivered stunning
images of celestial objects, including the pillars of dust and gas that
harbor nascent stars and the colorful death shrouds of aging, Sun-like stars.

Although the visible-light camera may be Hubble's "bread and butter"
instrument, it's by no means the telescope's only source of celestial
revenue. Hubble has a fleet of other science instruments that covers a
broad range of light, from ultraviolet to near infrared. These instruments
allow Hubble to probe a galaxy's hottest stars and to peer far across
space to study the evolution of galaxies. With Hubble's help, astronomers
have monitored weather patterns on our solar system planets and harvested
important information about stars and galaxies.

End quote


All up, imo, to anyone not _expressly_ interested in infrared, the JWST is
an inferior scope.

Dat's Me wrote:

You can hardly call the "JWST" a "Hubble II".

No, its a larger instrument designed to take advantage of the infrared
wavelenghs at a resolution which is 2.7 times that of HST and a light
gathering ability of 7.3 times that of HST. In its high orbit, it will not be
bothered as much by the presence of the Earth and will have nearly continuous
solar power, since the telescope will rarely (if ever) go into an eclipse as
HST does in low Earth orbit. Its mirror will be made of the metal Beryllium,
and, despite its larger aperture, will be only about a third as massive as the
mirror in HST.

All up, imo, to anyone not _expressly_ interested in infrared, the JWST is
an inferior scope.

You might want to visit the JWST web site and read the FAQ. HST has a big
advantage for the ultraviolet, produces some very pretty pictures for the
public, and has made important discoveries, but the JWST is definitely not an
"inferior" telescope at all. Although it is being optimized for the near and
mid infrared wavelengths, JWST will be usable to at least some extent in the
red portion of the visible spectrum (0.6 nanometers). There are some very
good reasons for optimizing the instrument for the infrared. For one thing,
infrared light penetrates gas and dust in our galaxy, allowing us to see
things much farther away and penetrate deep into the dusty obscured regions of
our galaxy. Much of the cutting work in Astronomy today is done in the
infrared (including that done by many of the largest ground-based telescopes).
Objects like extrasolar planets, forming planetary systems, and stellar
coccoons aren't easily seen in visible light, so infrared is again used to
look for and study them. Even the most distant objects in the universe are
often better studied in the infrared. A second reason is that it is easier to
construct and align a segmented mirror system at infrared wavelengths than it
is for the visible part of the spectrum (and lighter metallic materials can be
used). Most of the new super-large (mirrors larger than 10 meters)
ground-based telescopes which are being proposed for the next decade are being
optimized for the infrared, so JWST isn't alone in that regard. Check out the
following: http://www.jwst.nasa.gov/ for more information. Clear skies to
you.
--
David W. Knisely
Prairie Astronomy Club: http://www.prairieastronomyclub.org
Hyde Memorial Observatory: http://www.hydeobservatory.info/

**********************************************
* Attend the 11th Annual NEBRASKA STAR PARTY *
* July 18-23, 2004, Merritt Reservoir *
* http://www.NebraskaStarParty.org *
**********************************************

"David Knisely" wrote in message
...
Dat's Me wrote:

You can hardly call the "JWST" a "Hubble II".

No, its a larger instrument designed to take advantage of the infrared
wavelenghs at a resolution which is 2.7 times that of HST and a light
gathering ability of 7.3 times that of HST. In its high orbit, it will
not be
bothered as much by the presence of the Earth and will have nearly
continuous
solar power, since the telescope will rarely (if ever) go into an eclipse
as
HST does in low Earth orbit. Its mirror will be made of the metal
Beryllium,
and, despite its larger aperture, will be only about a third as massive as
the
mirror in HST.

All up, imo, to anyone not _expressly_ interested in infrared, the JWST
is
an inferior scope.

You might want to visit the JWST web site and read the FAQ. HST has a big
advantage for the ultraviolet, produces some very pretty pictures for the
public, and has made important discoveries, but the JWST is definitely not
an
"inferior" telescope at all. Although it is being optimized for the near
and
mid infrared wavelengths, JWST will be usable to at least some extent in
the
red portion of the visible spectrum (0.6 nanometers). There are some very
good reasons for optimizing the instrument for the infrared. For one
thing,
infrared light penetrates gas and dust in our galaxy, allowing us to see
things much farther away and penetrate deep into the dusty obscured
regions of
our galaxy. Much of the cutting work in Astronomy today is done in the
infrared (including that done by many of the largest ground-based
telescopes).
Objects like extrasolar planets, forming planetary systems, and stellar
coccoons aren't easily seen in visible light, so infrared is again used
to
look for and study them. Even the most distant objects in the universe
are
often better studied in the infrared. A second reason is that it is
easier to
construct and align a segmented mirror system at infrared wavelengths than
it
is for the visible part of the spectrum (and lighter metallic materials
can be
used). Most of the new super-large (mirrors larger than 10 meters)
ground-based telescopes which are being proposed for the next decade are
being
optimized for the infrared, so JWST isn't alone in that regard. Check out
the
following: http://www.jwst.nasa.gov/ for more information. Clear skies to
you.

What bothers me, is if they can't use the shuttles to service the Hubble
anymore, how will they repair and maintain the JWST, or any other
satellites?

The Ancient One wrote:

What bothers me, is if they can't use the shuttles to service the Hubble
anymore, how will they repair and maintain the JWST, or any other
satellites?

The new telescope won't be in low-earth orbit ("L2" is one of the
Lagrange points), so wouldn't be accessible to the shuttle anyway. It
is presumably designed not to require maintenance over its service
life. As for other satellites, those whose orbits are compatible with
the proposed 'safety-conscious' policies for shuttle missions will
remain accessible.

--
Odysseus

Dat's Me wrote:
On Wed, 04 Feb 2004 15:07:05 +0000, Dave wrote:

G=EMC^2 Glazier wrote:
the Hubble. We have no new Hubble 2 in the making. We have no new
safe space craft in the making.

Not quite true Bert, take a look at

http://ngst.gsfc.nasa.gov/



DaveL

You can hardly call the "JWST" a "Hubble II".


Perhaps I could been clearer, I never meant to imply it was an exact
replacement for the Hubble.


All up, imo, to anyone not _expressly_ interested in infrared, the
JWST is an inferior scope.

If you're only interested in pretty pictures, then try the following link:
http://ngst.gsfc.nasa.gov/science/NGC891.html

Also, see the response below by the senior project scientist on the JWST.
Other than that, David Knisely puts things more succinctly than I could in
his response.
Q: Why will JWST concentrate on the infrared part of the spectrum?

A: The main aim of JWST is to observe the light from the first luminous
objects in the universe. This light is shifted to longer wavelengths by the
expansion of the universe, so that light that was originally visible and
ultraviolet will be seen as infrared. For objects closer to home, JWST will
be able to observe visible light at wavelengths as short as about 0.6
micrometers, which has a color between yellow and red. While shorter
wavelength coverage would be desirable, it is not yet affordable for a
telescope as large as the JWST.





DaveL

To All Seems we do have a telescope on the drawing board. Detecting
infrared is the best way to go. Can we put a telescope in orbit the
same way we put our satellites in orbit,or does it take an astronaut to
fine tune it . 2011 is 7 years from now and I can't see shuttles being
around for that length of time.(hope not) It was also posted that
shuttles can't go that far out. I have a gut feeling there is a
con game going on. Bert

G=EMC^2 Glazier wrote:
To All Seems we do have a telescope on the drawing board. Detecting
infrared is the best way to go. Can we put a telescope in orbit the
same way we put our satellites in orbit,or does it take an astronaut
to fine tune it . 2011 is 7 years from now and I can't see shuttles
being around for that length of time.(hope not) It was also posted
that shuttles can't go that far out. I have a gut feeling
there is a con game going on. Bert

Bert,

It appears they're proposing to use an Arianne 5 to launch it to the L2
point.


DaveL