World's most sensitive radio telescope array set to be built in Nevada desert

[Igel]

3. They're radio telescopes.

They don't much care about time of day or the optical spectrum. They're after the long-wavelength part of the spectrum and what's important when they look away from Earth is what radio-emitters are 'out there'. Starlink probably uses specific microwave frequencies and most radio other sources are similarly well tuned to specific frequencies that don't usually overlap with the emission-line wavelengths that radio telescopes.