The NASA astronaut's photos of planet Earth as seen from outer space remain awe-inspiring, months after Wheelock first began to share them on his popular Twitter feed, @Astro_Wheels.
"The Earth at night, when viewed from space, is a beautiful mosaic of light that stirs the imagination," he tweeted Wednesday, alongside an image of South Africa.
The images are indeed dazzling: the lights of Ireland sparkling by night, a high peak in the Andes reaching up toward outer space and a dizzying view of the African continent stretching from Casablanca in Morocco down the Atlantic coast.
Wheelock has delighted his Twitter fans with the photos, even taking pictures of Hurricane Earl from space and offering up a series of "mystery" photos so followers can guess the destination pictures in the image. He is scheduled to come home Nov. 30.
The astronaut says he has mixed feelings that his five-month mission aboard the International Space Station is almost complete. On Wednesday, he shared a shot of Aurora Borealis, or the Northern Lights.
"Aurora Borealis as I will forever paint it in my dreams. Almost time to return home ... no regrets ... but mixed emotions," he tweeted. "Leonardo da Vinci was right ... 'For once you have tasted flight, you will forever walk the Earth with your eyes turned skyward, for there you have been ... and there you will long to return.'"