
"Using data from the U.S. Space Force's Space-Track.org, engineering component supply company ACCU determined there are currently 33,269 trackable objects in orbit. Of those, 17,682 are satellites. The rest is some form of junk, ranging form expended rocket bodies, to debris, to objects that could not be identified. This means that nearly 47% of tracked objects are space junk, the company wrote in a new report."
"However, with many satellites no longer operational, it means the true proportion of inactive or uncontrollable objects is even higher. Space junk has been accumulating since the first satellite, Sputnik 1, was launched in 1957. Yet the problem has grown sharply over the past decade as the cost of launches dropped and the cadence of space flights has increased. The amount of trackable objects in orbit rose by around 10,000 between 2020 and 2025 alone."
"ACCU notes that there may be millions of objects too tiny to track, such as paint flecks and other debris that came loose from rockets and other spacecraft. That poses a major risk: Most objects in orbit are traveling at upwards of 17,000 miles per hourat that speed, even the tiniest mote could inflict significant damage on orbiting infrastructure."
"In 2024, astronauts aboard the International Space Station had to take shelter following a collision with a small piece of debris, which left a visible chip in a window. That incident prompted the launch of a U.S. governmental program aimed at finding and monitoring low Earth orb"
Data from Space-Track.org shows 33,269 trackable objects in Earth orbit, including 17,682 satellites and the remainder classified as junk such as expended rocket bodies, debris, and unidentified objects. Nearly 47% of tracked objects are space junk, and the true proportion of inactive or uncontrollable objects is higher because many satellites are no longer operational. Space junk has accumulated since Sputnik 1 in 1957, but the problem has accelerated over the past decade as launch costs dropped and flight frequency increased. Trackable objects rose by about 10,000 between 2020 and 2025. Millions of smaller untrackable particles may also exist, and even tiny debris traveling at over 17,000 miles per hour can damage spacecraft and infrastructure. A 2024 collision with small debris chipped an ISS window and led to a U.S. program to find and monitor low Earth orbit debris.
Read at www.scientificamerican.com
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