Ayisha Ashruf and her colleagues at Vikram Sarabhai Space Centre tracked seventeen pieces of 1960s-era space junk for 36 years and found that once the Sun's sunspot count climbs past roughly two-thirds of a cycle's peak, the upper atmosphere starts pulli - Space Daily

Ayisha Ashruf and her colleagues at Vikram Sarabhai Space Centre tracked seventeen pieces of 1960s-era space junk for 36 years and found that once the Sun's sunspot count climbs past roughly two-thirds of a cycle's peak, the upper atmosphere starts pulli Space Daily Study shows how sunspot activity speeds up reentries Phys.org A 36-year sweep of orbital debris has found the solar threshold where Earth’s upper atmosphere starts pulling space junk down faster, just as mega-constellations crowd low