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තමන්ගේ ඔලුවට උඩින් තියෙන්නෙ මොනවාද බලාගන්න - Low Earth Orbit Visualization
- Thread starter SK29
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ඇයි අපට මේවා පියවි ඇහැට පේන්නෙ නැත්තෙ?
ChatGPT response:
We can sometimes see low-Earth-orbit (LEO) satellites with the naked eye — but only under specific conditions. Here’s why they’re usually not visible most of the time:
Satellites don’t produce their own light; they only reflect sunlight.
You can see them only when:
Low-orbit satellites (e.g., 300–1,200 km altitude) travel at about 7–8 km/s.
They cross the sky in a few minutes, so even when visible, they appear as a fast-moving star and are easy to miss unless you’re looking at the right spot and time.
Most LEO satellites are only a few meters across, reflecting limited sunlight.
Only large, reflective ones (like the ISS or Starlink satellites when newly deployed) are bright enough to see.
Typical satellites have a magnitude of +5 to +8 — too dim for unaided eyes under normal sky brightness.
Urban light pollution, haze, or moonlight easily drowns out faint satellite reflections.
In rural dark skies, you can see more of them — especially just after sunset.
In summary:
You can see low-orbit satellites briefly at dawn or dusk, but most remain invisible because they’re too small, too faint, or in Earth’s shadow when you’re looking.
------ Post added on Nov 8, 2025 at 2:07 AM
ChatGPT response:
We can sometimes see low-Earth-orbit (LEO) satellites with the naked eye — but only under specific conditions. Here’s why they’re usually not visible most of the time:
1. They Don’t Emit Light — They Reflect It
Satellites don’t produce their own light; they only reflect sunlight.You can see them only when:
- The Sun is below your horizon (dusk or dawn), and
- The satellite is still illuminated by sunlight high above you.
2. They Move Very Fast
Low-orbit satellites (e.g., 300–1,200 km altitude) travel at about 7–8 km/s.They cross the sky in a few minutes, so even when visible, they appear as a fast-moving star and are easy to miss unless you’re looking at the right spot and time.
3. They’re Small and Dim
Most LEO satellites are only a few meters across, reflecting limited sunlight.Only large, reflective ones (like the ISS or Starlink satellites when newly deployed) are bright enough to see.
Typical satellites have a magnitude of +5 to +8 — too dim for unaided eyes under normal sky brightness.
4. Light Pollution and Atmosphere
Urban light pollution, haze, or moonlight easily drowns out faint satellite reflections.In rural dark skies, you can see more of them — especially just after sunset.
Example of Visible LEO Satellites
- International Space Station (ISS): very bright (magnitude ≈ −3), visible for several minutes.
- Starlink trains: visible shortly after launch, appearing as a line of bright dots.
In summary:
You can see low-orbit satellites briefly at dawn or dusk, but most remain invisible because they’re too small, too faint, or in Earth’s shadow when you’re looking.
------ Post added on Nov 8, 2025 at 2:07 AM
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