some advantages of radio telescopes would be that radio waves are not blocked
by clouds and are not interfering with the Earth’s atmosphere; radio telescopes
can catch signals and movements during cloud cover. A disadvantage for having a
ground telescope is that the infrared from the Earth’s atmosphere absorbs most
of the ultraviolet and almost all of the infrared light that flows through it.
The Space Telescopes on the other hand, can see the waves happening there.
Completing astronomy from
observatories that are ground-based on Earth is limited by the filtering and
colliding of electromagnetic radiation (scintillation or twinkling) due to the
atmosphere. Space observatories can
generally be divided into two classes: missions which map the entire sky
(surveys), and observatories which focus on selected astronomical objects or
parts of the sky. A couple of terrestrial telescopes can reduce atmospheric
effects with adaptive sights. A telescope that orbits Earth outside the
atmosphere is more predictive neither to twinkling nor to light pollution from
fake light sources on Earth. As a result of this happening, the angular
resolution of space telescopes is often much smaller in size than a
ground-based telescope with a comparison that is the same aperture.
Space and ground observatories’ erase working ranges
compared against atmospheric transparency windows that are found by telescopes.
Frequency ranges are important mainly to space-based astronomy which is outside
the optical window and the radio window, the only two wavelength ranges of the
electromagnetic spectrum that are not affected by the atmosphere. For example,
when done from Earth X-ray astronomy is nearly impossible, and has reached its
current importance in astronomy only due to orbiting X-ray telescopes such as
the Chandra observatory and the XMM-Newton observatory (‘Telescope History,”
2011). Another that is largely blocked is Infrared and ultraviolet. These are
all great things that have occurred but all great advantages do come with a
price. Space telescopes are much more expensive to build than ground-based
telescopes, simply due to their location, and space telescopes are also
extremely difficult to maintain. The Hubble Space Telescope was serviced by the
Space Shuttle while many other space telescopes cannot be serviced at all. The
process to solve the problem for fixing telescopes is what is next on the list
for finding the solution for.
Although, telescopes are thought of
mainly as looking up into the sky at night from Earth. They’re mainly used in
space for discoveries about space, but the stereotype is true. Telescopes are
used on Earth for space exploration; they’re radio and optical telescopes. A
disadvantage of telescopes on Earth is the light affects them the most, which
is infrared and ultraviolet light. This is the most by the Earth’s atmosphere. Telescopes
must therefore always be positioned high above the ground or in space so that
the light will not hit the telescope and break the lens or the telescope itself.
NASA has not yet recorded that a telescope has been hit or damaged by light or
action of anything and destroyed a telescope (“Telescopes- NASA,” 2015).
In 2003, NASA decided to start the
plan to have a mission called “NASA’s Galaxy Evolution Explorer”. This is to
help better understand the formation of galaxies, which was the main purpose of
the launch. The studies that were discovered and kept were the shape,
brightness, size and distance of galaxies beyond the universe. Since its
launch, “GALEX” (nickname for Galaxy Evolution Explorer) has captured images of
more than a half-billion objects across two-thirds of the sky. The telescope’s
first observation, of the sky in the constellation Hercules, was credited to
the crew of the Space Shuttle Columbia. GALEX has detected star formation in
unexpected regions of the universe and spotting Mira, a fast-moving older star
called a red giant (“Telescopes,” 2003). There are of course other missions
being pursued by NASA, ESA and other space agencies; some are already up and
space, while others are only in the beginning phases, and will eventually be up
The importance of telescopes and why
they are used are for space exploration is mainly because it is almost impossible
to see anything in space with the human eye. Telescopes show a view of images,
ideas, and observations that are impossible to see without the use of telescopes.
They collect light that human eyes are unable to collect. Astronomers use
telescopes to see the colors in space, and they collect the light they see from
the telescopes that the naked eye cannot collect from looking up into space. Telescopes
and their progress throughout time and space exploration have been a huge
success. They have had many large impacts with space exploration but have also
had large indents with the discovery of space and the galaxies, and also the formation
of the stars. What’s next for the use of telescopes in space exploration is
what is next on the list. Although we do know that NASA is trying to have
another launch in June of 2019, according to NASA and what they are telling
sources. Expect to see New Horizons in the future with telescopes capturing
moments and images that have never been seen before. China is also trying to
perform a launch of their own into space, making China the third nation to
produce a launch into space with telescopes.