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ວັນຈັນ, 24 ສິງຫາ 2026
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ຍານ Cassini ຈະຢຸດ ການປະຕິບັດງານ ຄັ້ງສຸດທ້າຍ ດ້ວຍການບິນດິ່ງ ລົງໃສ່ດາວເສົາ

Cassini Spacecraft On Course for Final Death Dive into Saturn
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Cassini Spacecraft On Course for Final Death Dive into Saturn

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ລິງໂດຍກົງ

ເຊີນຊົມວິດີໂອ ກ່ຽວກັບ ລາຍງານນີ້.

ຫຼັງຈາກການປະຕິບັດພາລະກິດ ໄດ້ 20 ປີ, ຍານອະວະກາດ Cassini ແມ່ນກຳລັງ
ກຽມພ້ອມບິນດິ່ງລົງໃສ່ດາວເສົາ ຫລື Saturn ເປັນຄັ້ງສຸດທ້າຍ. ບັນດານັກວິທະຍາ
ສາດ ແລະ ນັກວິສະວະກອນ ທັງຫຼາຍທີ່ຫ້ອງວິໄຈແຮງຂັບເຄື່ອນຈະຫຼວດຂອງອົງ
ການ NASA ໄດ້ ກ່າວວ່າ ການຕັດສິນໃຈ ທີ່ຈະປິດຊີວິດຂອງຍານອະວະກາດໃນວິທີ
ນີ້ ແມ່ນຍ້ອນສິ່ງທີ່ເຂົາເຈົ້າໄດ້ຄົ້ນພົບ ໃນລະຫວ່າງ ການປະຕິບັດພາລະ ກິດ ທີ່ເປັນສ່ວນປະກອບຂອງສິ່ງທີ່ມີຊີວິດ ໃນເດືອນບາງໜ່ວຍ ຂອງ ດາວເສົານັ້ນ. ນັກຂ່າວວີໂອ
ເອ Elizabeth Lee ມີລາຍງານຈາກ ຫ້ອງວິໄຈແຮງຂັບເຄື່ອນຈະຫຼວດໃກ້ກັບນະຄອນ
Los Angeles. ໃນອັນດັບຕໍ່ໄປ ພຸດທະສອນ ຈະນຳລາຍລະອຽດມາສະເໜີທ່ານ.

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ຟັງລາຍງານ ຍານອະວະກາດ Cassini ຈະຢຸດ ການປະຕິບັດງານ ຄັ້ງສຸດທ້າຍ ດ້ວຍການຕົກ ດິ່ງລົງໄປ ໃນດາວ ເສົາ
by ສຽງອາເມຣິກາ ວີໂອເອລາວ

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ລິງໂດຍກົງ

ການປະຕິບັດພາລະກິດຂອງຍາອະວະກາດ Cassini ຢູ່​ທີ່ດາວ ເສົາ ແລະ ການສຶກສາ
ກ່ຽວກັບ ລະບົບວົງແຫວນ ແລະເດືອນຂອງດາວດັ່ງກ່າວ ໄດ້ນຳເອົາສິ່ງທີ່ພວກເຮົາບໍ່
ຄາດຄິດ ມາເປີດເຜີຍໃຫ້ຮູ້.

ທ່ານນາງ Morgan Cable ຜູ້ຊ່ວຍວິສະວະກອນ ໂຄງການລະບົບວິທະຍາສາດກ່າວ
ວ່າ “ໃນເວລາທີ່ມີການອອກແບບນັ້ນ, ພວກເຮົາບໍ່ໄດ້ຮູ້ເລີຍວ່າ ມະຫາສະໝຸດຕ່າງໆ
ແມ່ນມີຢູ່ແທ້ຢູ່ນອກອອກໄປ ຂອງລະບົບສຸລິຍະຈັກກະວານ.”

ມະຫາສະໝຸດພວກນີ້ ອາດໝາຍເຖິງສິ່ງທີ່ມີຊີວິດກໍເປັນໄດ້. ການຄົ້ນພົບທີ່ບໍ່ຄາດຄິດ
ແມ່ນມີຂຶ້ນ ໃນເຂດຂົ້ວໃຕ້ຂອງເດືອນ Enceladus, ເຊິ່ງເປັນໜຶ່ງໃນວົງແຫວນຂອງ
ດາວເສົາ.

ທ່ານນາງ Molly Bittner ນັກວິສະວະກອນລະບົບປະຕິບັດການຍານອະວະກາດ ໄດ້
ກ່າວວ່າ “ມັນມີມະຫະສະໝຸດນໍ້າແຫຼວຢູ່ທາງກ້ອງແລະ ມັນສົ່ງນໍ້າພຸຮ້ອນ ແລະ ຮອຍ
ແຕກພວກນີ້ ກໍເປີດອອກ ແລະ ສົ່ງນໍ້າພຸຮ້ອນຂຶ້ນມາ.”

ເຄື່ອງມືຂອງຍານ Cassini ສາມາດຈັບໄດ້ອາຍແກັສທີ່ອອກມາຈາກອາຍນໍ້າພຸຮ້ອນ
ດັ່ງກ່າວນັ້ນ.

ທ່ານນາງ Morgan Cable ກ່າວວ່າ “ພວກເຮົາຮູ້ວ່າມັນມີເກືອ. ​ເວລານີ້ມັນມີຄວາມ
ສຳຄັນສຳລັບສິ່ງທີ່ມີຊີວິດ ເພາະວ່າຊີວິດຕ້ອງການແຮ່ທາດ ແລະ ເກືອບາງ​ຢ່າງ. ພວກ
ເຮົາມີຫຼັກຖານທີ່ໜັກແໜ້ນວ່າ ມັນມີຊ່ອງນໍ້າຮ້ອນລົງໄປໃນກົ້ນຂອງມະຫາສະໝຸດ,
ເຊິ່ງເປັນອາຫານຂອງມະຫາສະໝຸດ. ປັດຈຸບັນນີ້ ທຸກໆເທື່ອເຈົ້າເຫັນຊ່ອງນໍ້າຮ້ອນຢູ່
ເທິງໂລກເຮົານີ້, ເຈົ້າກໍຈະພົບເຫັນຊຸມຊົນຂອງສິ່ງທີ່ມີຊີວິດຈຳນວນຫຼາຍ.”

ຍານ Cassini ຍັງໄດ້ເກັບກຳຂໍ້ມູນຈາກເດືອນທີ່ໃຫຍ່ທີ່ສຸດຂອງດາວເສົາຊື່ວ່າ Titan
ອີກດ້ວຍ ເຊິ່ງມີໜອງ ແລະ ທະເລທີ່ເປັນທາດ Methane ແລະ Ethane ທີ່ເປັນຂອງ
ແຫຼວແທນທີ່ຈະແມ່ນນໍ້າ. ມັນຍັງມີຫຼັກຖານ ກ່ຽວກັບ ມະຫາສະໝຸດຂອງແຫຼວຢູ່ກ້ອງ
ພື້ນດິນ ທີ່ອາດຈະມີສານ Ammonia ແລະ ນໍ້າ. ບັນດານັກວິທະຍາສາດ ແລະ ວິສະ
ວະກອນກ່າວວ່າ ສິ່ງແວດລ້ອມດັ່ງກ່າວ ອາດປະຄອງສິ່ງທີ່ມີຊີວິດໄດ້.

ທ່ານ Morgan Cable ກ່າວວ່າ “ພວກເຮົາຍັງມີໂອກາດທີ່ຈະພະຍາຍາມຊອກຫາສິ່ງ
ທີ່ມີຊີວິດທີ່ແປກໃນສະຖານທີ່ຄືແນວນີ້ ແລະ ພວກເຮົາໄດ້ຄົ້ນພົບສະຖານທີ່ໆແປກຢູ່
ບ່ອນນີ້ ໃນລະບົບສຸລິຍະຈັກກະວານ ຂອງພວກເຮົາ.”

ສຳລັບວິທີທີ່ຈະທຳລາຍຍານ Cassini ນັ້ນ, ເຊິ່ງຕອນນີ້ມັນກຳລັງຈະໝົດ​ເຊື້ອ​ໄຟ
ແມ່ນສິ່ງໜຶ່ງທີ່ບັນດານັກວິທະຍາສາດ ແລະ ນັກວິສະວະກອນທັງຫຼາຍກຳລັງພະຍາ
ຍາມທີ່ຈະຄົ້ນຄິດ. ໃນເມື່ອເຂົາເຈົ້າບໍ່ຢາກໃຫ້ສິ່ງທີ່ມີຊີວິດໃດໆຈາກໂລກທີ່ອາດຕິດ
ຢູ່ຍານ Cassini ໄປປົນເປື້ອນຢູ່ເດືອນທີ່ອາດມີສິ່ງທີ່ມີຊີວິດນັ້ນ.

ທ່ານ Morgan Cable ກ່າວວ່າ “ຂ້າພະເຈົ້າຢາກຊອກຫາສິ່ງທີ່ມີຊີ ວິດຢູ່ບ່ອນອື່ນ ຄື
ເດືອນ Enceladus ແຕ່ຂ້າພະເຈົ້າບໍ່ຢາກຮູ້ພາຍຫຼັງ ກ່ຽວກັບ ສິ່ງທີ່ເຮົາໄດ້ເອົາໄປປະ
ໄວ້ທີ່ນັ້ນ.”

ບັນດານັກວິທະຍາສາດ ແລະ ນັກວິສະວະກອນ ໄດ້ວາດພາບ ກ່ຽວກັບ ການກັບໄປປະ
ຕິບັດພາລະກິດຢູ່ທີ່ດາວເສົາ ແລະ ເດືອນຂອງມັນໃນອະນາຄົດ ເພື່ອທຳການຄົ້ນຫາ
ສິ່ງທີ່ອາດມີຊີິວິດລົງເລິກກວ່າເກົ່າ.

ທ່ານນາງ Morgan Cable ກ່າວວ່າ “ຂ້າພະເຈົ້າຄິດວ່າ ການໃຊ້ເຄື່ອງມືຂອງທຸກມື້ນີ້,
ແລະ ສິ່ງຕ່າງໆທີ່ເຮົາສາມາດເອົາຂຶ້ນໄປໃນຍານ ອະວະກາດໃນຕອນນີ້, ພວກເຮົາ
ແມ່ນສາມາດທີ່ຈະຄົ້ນພົບສິ່ງທີ່ມີຊີວິດນັ້ນ ດ້ວຍເຄື່ອງມືຂອງພວກເຮົາໃນປັດຈຸບັນນີ້.”

ເບິ່ງຄືວ່າ ຈຸດຈົບຂອງຍານ Cassini ຈະເປັນການບິນ​ດິ່ງລົງໄປ ໃນຊັ້ນບັນຍາກາດ
ຂອງດາວເສົາ ແລະ ສົ່ງຂໍ້ມູນທີ່ສຳຄັນກັບສູ່ໂລກຈົນເຖິງວິນາທີສຸດທ້າຍ. ຂໍ້ມູນຂອງ
ມັນຈະຖືກນຳມາສຶກສາ ແລະ ວິເຄາະ ໂດຍບັນດານັກວິທະຍາສາດເປັນເວລາດົນ
ນານຫຼັງຈາກຍານ Cassini ໄດ້ສິ້ນສຸດພາລະກິດຂອງມັນ.

ຮູບວົງແຫວນ ແລະເດືອນ ຂອງດາວເສົາ ຖ່າຍໂດຍຍານ Cassini

This Jan. 28, 2016 image made available by NASA shows Saturn's rings, including the darker series of bands called the Cassini Division between the bright B ring, left, and dimmer A ring, right.
1/15 This Jan. 28, 2016 image made available by NASA shows Saturn's rings, including the darker series of bands called the Cassini Division between the bright B ring, left, and dimmer A ring, right.
This Aug. 12, 2009 composite image made available by NASA shows Saturn in equinox seen by the approaching Cassini spacecraft. Saturn's equinox occurs only once in about 15 Earth years.
2/15 This Aug. 12, 2009 composite image made available by NASA shows Saturn in equinox seen by the approaching Cassini spacecraft. Saturn's equinox occurs only once in about 15 Earth years.
This Dec. 3, 2015 image made available by NASA shows three of Saturn's moons - Tethys, above, Enceladus, second left, and Mimas, seen from the Cassini spacecraft.
3/15 This Dec. 3, 2015 image made available by NASA shows three of Saturn's moons - Tethys, above, Enceladus, second left, and Mimas, seen from the Cassini spacecraft.
This 2007 image made available by NASA shows a hydrocarbon sea named Ligeia Mare on Saturn's moon Titan, as seen by the Cassini spacecraft.
4/15 This 2007 image made available by NASA shows a hydrocarbon sea named Ligeia Mare on Saturn's moon Titan, as seen by the Cassini spacecraft.
This Aug. 14, 2014 image made available by NASA shows shadows of Saturn's rings projected on the southern hemisphere of the gas giant.
5/15 This Aug. 14, 2014 image made available by NASA shows shadows of Saturn's rings projected on the southern hemisphere of the gas giant.
The Cassini spacecraft has captured the first detailed images of a giant hurricane on Saturn.
6/15 The Cassini spacecraft has captured the first detailed images of a giant hurricane on Saturn.
This Aug. 23, 2014 image made available by NASA shows the fluid dynamics in Saturn's uppermost cloud layers.
7/15 This Aug. 23, 2014 image made available by NASA shows the fluid dynamics in Saturn's uppermost cloud layers.
The Saturn moons Mimas and Pandora appear together in this image taken by NASA's Cassini spacecraft. Pandora's small size means that it lacks sufficient gravity to pull itself into a round shape like its larger sibling, Mimas. (NASA/JPL-Caltech/Space Science Institute)
8/15 The Saturn moons Mimas and Pandora appear together in this image taken by NASA's Cassini spacecraft. Pandora's small size means that it lacks sufficient gravity to pull itself into a round shape like its larger sibling, Mimas. (NASA/JPL-Caltech/Space Science Institute)
Enceladus, one of moons of Saturn, as seen by NASA's Cassini spacecraft. (NASA)
9/15 Enceladus, one of moons of Saturn, as seen by NASA's Cassini spacecraft. (NASA)
This image of Saturn taken with the Cassini spacecraft wide-angle camera on Nov. 23, 2013 and released on Feb. 3, 2014 was taken using a spectral filter that preferentially admits wavelengths of near-infrared light centered at 752 nanometers. (NASA/JPL-Cal Tech)
10/15 This image of Saturn taken with the Cassini spacecraft wide-angle camera on Nov. 23, 2013 and released on Feb. 3, 2014 was taken using a spectral filter that preferentially admits wavelengths of near-infrared light centered at 752 nanometers. (NASA/JPL-Cal Tech)
In this rare image taken on July 19, 2013, the wide-angle camera on NASA&#39;s Cassini spacecraft has captured Saturn&#39;s rings and our planet Earth and its moon in the same frame. (Credit: NASA/JPL-Caltech/Space Science Institute)<br /> <br /> &nbsp;
11/15 In this rare image taken on July 19, 2013, the wide-angle camera on NASA's Cassini spacecraft has captured Saturn's rings and our planet Earth and its moon in the same frame. (Credit: NASA/JPL-Caltech/Space Science Institute)

 
Dione with Enceladus in the background. This image was taken by the Cassini spacecraft, Sept. 8, 2015.
12/15 Dione with Enceladus in the background. This image was taken by the Cassini spacecraft, Sept. 8, 2015.
This Nov. 13, 2015 composite image made available by NASA shows an infrared view of Saturn&#39;s moon, Titan, as seen by the Cassini spacecraft. The near-infrared wavelengths in this image allow the cameras to penetrate the haze and reveal the moon&#39;s surface.
13/15 This Nov. 13, 2015 composite image made available by NASA shows an infrared view of Saturn's moon, Titan, as seen by the Cassini spacecraft. The near-infrared wavelengths in this image allow the cameras to penetrate the haze and reveal the moon's surface.
This Feb. 17, 2005 image made available by NASA shows plumes of water ice and vapor from the south polar region of Saturn&#39;s moon Enceladus. The activity is understood to originate from the moon&#39;s subsurface ocean of salty liquid water, which is venting into space.
14/15 This Feb. 17, 2005 image made available by NASA shows plumes of water ice and vapor from the south polar region of Saturn's moon Enceladus. The activity is understood to originate from the moon's subsurface ocean of salty liquid water, which is venting into space.
This series of images from NASA&rsquo;s Cassini spacecraft shows the development of the largest storm seen on the planet since 1990. These true-color and composite near-true-color views chronicle the storm from its start in late 2010 through mid-2011, showing how the distinct head of the storm quickly grew large but eventually became engulfed by the storm&rsquo;s tail.
15/15 This series of images from NASA’s Cassini spacecraft shows the development of the largest storm seen on the planet since 1990. These true-color and composite near-true-color views chronicle the storm from its start in late 2010 through mid-2011, showing how the distinct head of the storm quickly grew large but eventually became engulfed by the storm’s tail.
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After a 20-year mission, the spacecraft Cassini is preparing to make a final death dive into the planet Saturn.Scientists and engineers at NASA's Jet Propulsion Laboratory said their decision to end the life of the spacecraft in this way is because of what they found during the missionthe ingredients for life are present in some of Saturn's moons.VOA's Elizabeth Lee reports from the Jet Propulsion Laboratory near Los Angeles.


The Cassini spacecraft's mission to Saturn and its study of the system of rings and moons brought many surprises.


((MORGAN CABLE, ASSISTANT PROJECT SCIENCE SYSTEMS ENGINEER))
"At the time of its design, we had no idea that ocean worlds existed in the outer solar system."


These ocean worlds could mean life.One unexpected discovery came from the south pole of Enceladus, a moon embedded in one of Saturn's rings.


((MOLLY BITTNER, SPACECRAFT OPERATIONS SYSTEMS ENGINEER))
"It has a liquid water ocean underneath and it shoots geysers and these cracks open up and these geysers shoot up."

Instruments on Cassini have been able to detect the gas coming from that geyser plume.


((MORGAN CABLE, ASSISTANT PROJECT SCIENCE SYSTEMS ENGINEER))
"We know that there are salts. Now this is important for life because life needs certain minerals and salts to exist.We have very strong evidence that there are hydro-thermal vents down at that base of that ocean, the ocean flood. Now any time you find hydro-thermal vents here on Earth, you find rich communities of organisms."


Cassini was also able to gather data from the Saturn's largest moon, Titan, which has lakes and seas of liquid methane and ethane instead of water.There is also evidence of a liquid ocean beneath the surface that probably contains ammonia and water.Scientists and engineers say the environment could still hold life.


((MORGAN CABLE, ASSISTANT PROJECT SCIENCE SYSTEMS ENGINEER))
"We're still open to trying to look for weird life in places like this and we found a strange place right here in our solar system."


How to dispose of Cassini, now that it's running out of fuel is something scientists and engineers are trying to figure out since they don't want any earthly organisms that may be on Cassini to contaminate a moon that may have life.


((MORGAN CABLE, ASSISTANT PROJECT SCIENCE SYSTEMS ENGINEER))
"I want to find life elsewhere in a place like Enceladus but I don't want to realize later on that we put it there."


((NARRATOR))
Scientists and engineers are already envisioning future missions back to Saturn and its moons to look deeper into the possibility of life.


((MORGAN CABLE, ASSISTANT PROJECT SCIENCE SYSTEMS ENGINEER))
"And I think with today's instrumentation, things that we could put on a spacecraft right now, we could find that life with our instruments of today."


It looks like the end of Cassini will be a death dive into Saturn's atmosphere, sending critical data to Earth until the very end.It's information that will be studied and analyzed by scientists long after the end of Cassini.

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