Hello everyone.
This is Kevin from Two&Solutions
Today, a plan to construct radio telescope in a crater
on the Moon by NASA
Jet Propulsion laboratory
NASA engineers are exploring a chance of setting up
a colossal kilometre-wide
radio telescope in a three-kilometre-wide crater on the moon.
This crater
shows a suitable depth-to-diameter ratio
for Lunar Crater Radio Telescope (LCRT).
There are 82000 candidates crater with 3 to 5 km diameter range on the Moon (the detailed video link in description).
This is Electromagnetic Atmospheric Opacity map,
Starting with shorter wavelengths, Gamma rays and X-rays
are best to observe from space.
Visible wavelength is good
observable from Earth. from Earth.
The atmospheric windows
define less absorption of radiation
by atmospheric gases,
including the visible and near infrared wavelength
0.4 to 0.9 μm (400 to 900 nm), and the infrared wavelength
8 to 13 μm. This Lunar Crater Radio Telescope
lets scientists and enginners observe the early universe
in 6 to 30 MHz frequency band
(ie, 10 to 50 m wavelength).
This NASA Principal Investigator, robotics engineer
Dr. Saptarshi Bandyopadhyay,
said extremely long radio waves of the Big Bang
linked to the evolution of the universe
were absorbed in the Ionosphere on Earth,
and looking for other ways
to build this giant, wire-mesh antenna in Far Side of the Moon.
This is eligible to detect incoming long wavelength radio emission.
The 305-metre-wide
Arecibo telescope collapsed in Puerto Rico
December 2020 after it had contributed to
huge scientific discoveries
in the past few decades
in the field of cosmology.
This example shows significant engineering challenges
of this huge antenna on the Moon.
The Lunar Crater Radio Telescope
would be distributed by ongoing
NASA developing robotic rovers,
which unfold the massive aluminum-mess antenna.
It looks like a dish-shaped spider web
inspired by the art of folding paper,
Dr. Saptarshi Bandyopadhyay explained it
in the interview with CBC news early 2021.
The lower gravity on the moon
and no atmosphere
indicate a larger structure can be built
with lighter materials,
and no winter storms
and less environmental factors
like on Earth, respectively.
However, it would be absolutely challenging
from the harsh temperatures of the moon.
If you want to see Axel
and tether robotics testing
video at Mojave desert.
Please see the link as below in the description in this video.
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