AEON Enigma of the Night What is coma in telescope optics? Medium July 16, 2026 What is coma in telescope optics? A A rest period in the telescope mount's GoTo computer during thermal recalibration between targets B The diffuse spherical cloud of gas and dust surrounding the nucleus of an active inbound comet C The prismatic color smearing of stars caused by atmospheric dispersion when observing near the horizon D An off-axis aberration causing stars away from the field center to appear comet-shaped with smeared tails Want more? Take the full quiz → Create a free account to track your progress Practice Mode ✕ Next question → 🌟 You've been through all the questions! Great work. Start over Dashboard Quiz Star Chart Weather Gallery Settings
