
6 COMPARISONS
Three telescopes—the James Webb Space Telescope
(JWST), the Five-hundred-meter Aperture Spherical
radio Telescope (FAST), and the Event Horizon
Telescope (EHT)—represent different observation
methodologies, built-in limitations, and promising
research directions, as outlined in the text above.
JAMES WEBB SPACE TELESCOPE, using its 6.5-
meter segmented primary mirror and advanced
infrared instrumentation (NIRCam, NIRSpec, MIRI,
NIRISS), operates chiefly in the infrared regime, able
to push through dust and gas to unveil the earliest
universe's galaxy clusters and star-forming regions;
but, because it uses infrared detection, it needs
extremely low operational temperatures, submitted to
as required by an advanced visor block structure in
protecting solar and Earthly heat inputs, both an
engineering achievement but at the cost of sensitivity
in terms of its spectral range. Alternatively, FIVE-
HUNDRED-METER APERTURE SPHERICAL
RADIO TELESCOPE, the largest single-dish radio
telescope in the world with its 500-meter reflecting
surface made up of thousands of triangular panels,
uses radio wavelength detection on observing pulsars,
Five-hundred-meter Aperture Spherical Radio
Telescope radio bursts, and the emissions of neutral
hydrogen inaccessible to optical telescopes; but,
FIVE-HUNDRED-METER APERTURE
SPHERICAL RADIO TELESCOPE’s conception
and function demand fine calibration of its feed cabin
support system in order to accurately convert the
signal, one problem serving as an echo of limitations
in terms of resolving power of the signal as well as
the practical limitations on constructing very large
apertures. Alternatively, EVENT HORIZON
TELESCOPE utilizes an international array of linked
radio telescopes in Very Long Baseline
Interferometry (VLBI), gaining an Earth-sized virtual
aperture in order to create unparalleled high-
resolution imagery of black hole event horizons, as
illustrated in its historic snaps of the M87 black hole
as well as Sgr A'; but, EVENT HORIZON
TELESCOPE’s observation regime is by nature
bounded in ability by the problems in coordinating
global data sets, the technological requirements of
atomic clock sampling, as well as in data synthesizing
procedures that limit the frequency as well as breadth
of accomplishable observation. Looking ahead, as
each telescope has extended the boundaries of current
knowledge about astrophysical phenomena—the
JAMES WEBB SPACE TELESCOPE with the
revelation of galaxies 330 million years after the Big
Bang, FIVE-HUNDRED-METER APERTURE
SPHERICAL RADIO TELESCOPE with the
detection of more than 800 pulsars, and EVENT
HORIZON TELESCOPE with the verification of
general relativity with direct black hole imaging—the
prospects are strong: JAMES WEBB SPACE
TELESCOPE's ongoing deep space explorations can
possibly shed light on the reionization era as well as
exoplanet atmospheres, FIVE-HUNDRED-METER
APERTURE SPHERICAL RADIO TELESCOPE's
developments can lead towards better detection of
dark matter as well as gravitational waves, and
EVENT HORIZON TELESCOPE's network
expansion as well as improvement in resolution is
likely to unveil even greater details about black hole
dynamics as well as jet formation, together ushering
in an era of revolutionary astronomical investigation.
7 CONCLUSIONS
To sum up, the field of telescopes has come on in
leaps and bounds since the 19th century,
revolutionizing the capacity for observing the
universe. This paper discusses the cutting-edge
technology of three seminal telescopes—the James
Webb Space Telescope (JAMES WEBB SPACE
TELESCOPE), the Five-hundred-meter Aperture
Spherical Radio Telescope (FAST), and the Event
Horizon Telescope (EVENT HORIZON
TELESCOPE)—with particular emphasis on their
foundational design principles, instrumental
structures, and detection methods. In the investigation,
it has been found out JAMES WEBB SPACE
TELESCOPE’ s infrared observing capability has
revealed nascent galaxies and exoplanetary
atmospheres, FIVE-HUNDRED-METER
APERTURE SPHERICAL RADIO TELESCOPE’s
refined radio measurements have discovered in
excess of 800 pulsars and Five-hundred-meter
Aperture Spherical Radio Telescope radio bursts, and
EVENT HORIZON TELESCOPE’s global
interferometer has imaged black hole shadows for the
first time in history, confirming predictions central to
general relativity. Not only do these findings
demonstrate noteworthy technical advances in
detector technology and data combination but also
enhance current knowledge of galaxy assembly, star
formation, as well as the underlying astrophysics
processes. Ultimately, the research emphasizes the
transformative power of innovative designs in
expanding astronomical knowledge and suggests
promising areas for future dark matter, dark energy,
and the origins of life explorations
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