The cosmos is under threat, and it's not from aliens – it's from us. Space historian and science communicator Amy Shira Teitel is sounding the alarm: the problem of space junk is rapidly escalating, and it's endangering everything we've put into orbit, from vital satellites to the astronauts themselves. Imagine millions of pieces of human-made debris, zipping around the Earth at nearly 18,000 mph in Low Earth Orbit (LEO), the very zone where we house crucial infrastructure like the International Space Station (ISS). Recently, a spacecraft carrying Chinese astronauts was damaged by space debris, underscoring the immediate danger.
Teitel stresses that this isn't some far-off problem of the future; it's happening right now. For decades, we've launched rockets and satellites without fully considering the long-term consequences. Now, we're dealing with the fallout. NASA confirms that millions of debris fragments, ranging from tiny paint flecks to entire defunct satellites, are swirling around our planet. This issue dates back to the dawn of the space age, with relics like Vanguard 1, launched in 1958, still orbiting Earth. Upper rocket stages, explosive bolts, satellite housings, and aging spacecraft all contribute to this growing cloud of space junk.
"With so many abandoned objects in space, not everything returns safely," Teitel explains. "And many satellites remain in high orbits for decades, meaning they’re still part of the debris problem.”
But here's where it gets controversial... Even the smallest pieces of debris pose a significant threat. At orbital speeds, a mere fleck of paint can cripple or destroy active spacecraft. The ISS has already had to perform over 20 debris-avoidance maneuvers to dodge potential collisions. Furthermore, objects in orbit slowly fall towards Earth due to atmospheric drag. Without regular boosts, satellites lose altitude and eventually re-enter the atmosphere. However, not all re-entries are controlled. Remember Skylab, NASA's first space station? It re-entered on July 11, 1979, scattering debris across Western Australia.
Inactive satellites in higher orbits decay slowly, sometimes taking centuries to fall back to Earth. Collisions, even between small fragments, create even more debris, leading to a cascading chain reaction. This increases the density of space junk and raises the risks for every future mission.
"It’s a compounding issue,” Teitel states. “More satellites create more chances for collisions, and every collision produces more debris. Without intervention, the cycle continues indefinitely.”
As our reliance on satellites for communication, navigation, weather forecasting, and scientific research grows, the urgency to find solutions becomes even more critical. Teitel emphasizes the need for active debris removal, responsible satellite disposal, and sustainable launch practices to safeguard long-term access to space.
And this is the part most people miss... Asteroids also contain valuable metals, and some startups see them as a cleaner alternative to Earth-based mining, although the technology isn't fully developed yet. California-based TransAstra is developing an inflatable “Capture Bag” designed to collect everything from small fragments to massive boulders. The company believes this technology could also help remove human-made space junk.
Teitel concludes with a powerful message: “If we treat orbital cleanup as essential rather than optional, we can preserve space as a resource for future generations.”
About Amy Shira Teitel:
Amy Shira Teitel is a renowned spaceflight historian, author, and multimedia science communicator. She is known for bringing the human stories and engineering breakthroughs of early space exploration to life. She is the creator and host of Vintage Space, a long-form educational YouTube channel with in-depth videos on historic missions, forgotten programs, and the technological evolution that shaped the space age.
Teitel is the author of Breaking the Chains of Gravity: The Story of Spaceflight before NASA and Fighting for Space: Two Pilots and Their Historic Battle for Female Spaceflight, two critically acclaimed books that examine the origins of American rocketry and the pioneering women who helped build the aerospace industry.
She recently relaunched her second YouTube channel, offering casual, commentary-driven videos that explore modern topics through a historical lens.
- The Vintage Space (long-form history of science documentaries):
- Amy Shira Teitel (casual commentary channel):
For more information about Teitel and her groundbreaking work, click here:
What are your thoughts? Do you think enough is being done to address the space junk crisis? Are there any solutions you believe are particularly promising? Share your opinions in the comments below – let's start a conversation!
