The former Countdown co-host shared an image of herself smiling as she raised a mug and looked into the camera, wearing a dark green push-up bikini and with her hair styled into loose waves.
The throwback image dates back to 2010, when the maths whiz's friend took a photo of Carol to the International Space Station so she could "sunbathe in space".
The broadcaster posted it ahead of another of her souvenirs making the out-of-this-world trip, as she asked her fans for advice.
The glamorous 62-year-old wrote: "In 2010 a friend of mine from NASA was so kind on his trip to the International Space Station and took up a few trinkets for my family including this photo of me. He took a photo of the photo in the ISS with earth behind and I treasure it. It means 'I've sunbathed in space'. Ha."
The star went on: "Cut to 2023 and a beloved astronaut friend of mine (formerly NASA and legendary) is now the Chief Astronaut for Axiom Space. I'm off to see his launch scheduled for November. So he's said he'll take something up to the ISS for me this time. I've decided to choose a ring… The problem is I don't have one!!!
"As you know I'm allergic to wedding rings and useless at choosing things, so can you help? Send me some ideas in the comments and tell me where they're from, I'll take a look… very exciting… And thank you… "
While some followers gave ideas for ring designs and retailers, another teased appreciatively in response: "If there's anything that's going to attract the attention of alien life, it's Vorders in a bikini!"
The mum-of-two has often turned heads in her selection of eye-catching bikinis, including during her two appearances on I'm A Celebrity.
Before her recent "brutal" role on this year's All Stars version of the show, she modelled a variety of swimwear, uploading a slew of pictures including a radiant snapshot of herself rocking a bold leopard print bikini.
Carol looked flawless in the photos as she took a few quick mirror selfies inside her lavish-looking bell tent.
She wore her blonde tresses loose in the behind-the-scenes snapshots and elevated her sultry beach look with a sleek white manicure.
Carol during her recent stint on I'm A Celeb
Sharing the photos with her Instagram followers, Carol penned: "These pics are from when we were coming to the end of our covid isolation before we went into camp.
"Swimsuits or bikinis? I couldn't make my mind up [thinking face emoji]. All days could only be spent exercising and lolling around... not allowed to leave the tent lodge for obvious reasons. I loved these days chilling but getting very excited for what's to come..."
Fans went berserk in the comments section, with one writing: "Wow you look amazing," while a second penned: "Definitely the leopard print, to go with the jungle theme."
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