Explain two reasons why astronomers are continually building larger and larger telescopes. explain two reasons why astronomers are continually building larger and larger telescopes. larger telescope mirrors have a larger surface area and can therefore collect more light, which makes faint objects bright enough to detect. also, larger telescope mirrors produce less scattering of light due to diffraction, which contributes to better angular resolution. larger telescope mirrors have a larger surface area and can therefore collect more light, which contributes to better angular resolution. also, larger telescope mirrors produce more scattering of light due to diffraction, which makes faint objects bright enough to detect. larger telescope mirrors have a larger surface area and can therefore collect more light, which makes faint objects bright enough to detect. also, larger telescope mirrors produce more scattering of light due to diffraction, which contributes to better angular resolution. larger telescope mirrors have a larger surface area and can therefore collect more light, which contributes to better angular resolution. also, larger telescope mirrors produce less scattering of light due to diffraction, which makes faint objects bright enough to detect.