NASA's Lucy Spacecraft Is Speeding toward Another Close Encounter with an Asteroid

 This image from video animation provided by NASA in October 2022 depicts the Lucy spacecraft. (NASA via AP)
This image from video animation provided by NASA in October 2022 depicts the Lucy spacecraft. (NASA via AP)
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NASA's Lucy Spacecraft Is Speeding toward Another Close Encounter with an Asteroid

 This image from video animation provided by NASA in October 2022 depicts the Lucy spacecraft. (NASA via AP)
This image from video animation provided by NASA in October 2022 depicts the Lucy spacecraft. (NASA via AP)

NASA’s Lucy spacecraft will swoop past a small asteroid this weekend as it makes its way to an even bigger prize: the unexplored swarms of asteroids out near Jupiter.

It will be the second asteroid encounter for Lucy, launched in 2021 on a quest that will take it to 11 space rocks. The close approaches should help scientists better understand our early solar system when planets were forming; asteroids are the ancient leftovers.

The upcoming flyby is a dress rehearsal for 2027 when Lucy reaches its first so-called Trojan asteroid near Jupiter.

Cranking up its three science instruments, the spacecraft on Sunday will observe the harmless asteroid known as Donaldjohanson. The encounter will take place 139 million miles (223 million kilometers) from Earth in the main asteroid belt between Mars and Jupiter, so far away it will take 12 minutes for each bit of data to reach flight controllers in Colorado.

The paleontologist for whom the asteroid is named plans to be at spacecraft builder and operator Lockheed Martin’s Mission Control for all the action. He discovered the fossil Lucy in Ethiopia 50 years ago; the spacecraft is named after the famous human ancestor.

NASA’s Lucy will venture as close as 596 miles (960 kilometers) to this asteroid, an estimated 2 ½ miles (4 kilometers) in length but much shorter in width. Scientists should have a better idea of its size and shape following the brief visit. The spacecraft will zoom by at more than 30,000 mph (48,000 kph).

The asteroid is among countless fragments believed to have resulted from a major collision 150 million years ago.

“It's not going to be a basic potato. We already know that,” said lead scientist Hal Levison of Southwest Research Institute.

Rather, Levison said the asteroid may resemble a bowling pin or even a snowman like Arrokoth, the Kuiper Belt object visited by NASA's New Horizon spacecraft in 2019. The other possibility is that there are two elongated but separate asteroids far apart.

“We don’t know what to expect. That’s what makes this so cool,” he said.

There will be no communications with Lucy during the flyby as the spacecraft turns its antenna away from Earth in order to track the asteroid. Levison expects to have most of the science data within a day.

Lucy’s next stop — “the main event,” as Levison calls it — will be the Trojan asteroids that share Jupiter’s orbit around the sun. Swarms of Trojans precede and follow the solar system’s largest planet as it circles the sun. Lucy will visit eight of them from 2027 through 2033, some of them in pairs of two.

Lucy’s first asteroid flyby was in 2023 when it swept past little Dinkinesh, also in the main asteroid belt. The spacecraft discovered a mini moon around it.



Saudi Medical Team Separates Conjoined Twins in Groundbreaking 15-Hour Surgery

The procedure was carried out by a dedicated team of 36 consultants and specialists from multiple disciplines. SPA
The procedure was carried out by a dedicated team of 36 consultants and specialists from multiple disciplines. SPA
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Saudi Medical Team Separates Conjoined Twins in Groundbreaking 15-Hour Surgery

The procedure was carried out by a dedicated team of 36 consultants and specialists from multiple disciplines. SPA
The procedure was carried out by a dedicated team of 36 consultants and specialists from multiple disciplines. SPA

The medical and surgical team of the Saudi Conjoined Twins Program successfully separated on Wednesday Eritrean twins Asma and Someya, who were joined at the head, at King Abdullah Specialist Children’s Hospital in Riyadh.

King Salman Humanitarian Aid and Relief Centre (KSrelief) Supervisor General and head of the medical team Dr. Abdullah Al Rabeeah said the complex procedure, which lasted more than 15 hours, was carried out in adherence to Saudi leadership directives by a dedicated team of 36 consultants and specialists from multiple disciplines.

The team employed neuronavigational technology and surgical microscopy to ensure precise planning and uphold the highest safety standards.

He added that this operation marks the 64th separation performed under the Saudi Conjoined Twins Program, which has treated over 149 cases from 27 countries over the past 35 years.

The program continues to receive strong support from Custodian of the Two Holy Mosques King Salman bin Abdulaziz Al Saud and Prince Mohammed bin Salman bin Abdulaziz Al Saud, Saudi Crown Prince and Prime Minister.

Over the years, it has achieved outstanding medical successes, showcasing the advanced capabilities and professionalism of Saudi Arabia's healthcare sector and its medical teams.

Consultant pediatric neurosurgeon and head of the Pediatric Neurosurgery Dr. Moutasem Azzubi explained that the twins underwent a comprehensive evaluation, which revealed the fusion of skull bones, brain membranes, veins, and certain arteries.

The separation was conducted in stages, beginning with an initial surgical procedure followed by three interventional radiology procedures to block shared arteries and veins. The pediatric plastic surgery team inserted tissue expanders under the skin to stretch it over several months and allow sufficient skin coverage after the separation.

The twins' family expressed their sincere gratitude to the Saudi leadership for making this life-saving procedure possible and ensuring their children received the best medical care. They also commended the Kingdom’s humanitarian efforts and extended thanks for the generous hospitality they received during their stay in Saudi Arabia.