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Light pollution is an issue that affects both urban and rural astronomers. It occurs when artificial light from sources like street lamps, building lights, and vehicle headlights flood the night sky. This excess light creates a glowing background that washes out the faint glimmers of stars and galaxies. As a result, astronomers struggle to see celestial bodies, especially those that emit less light.

1. Reduces sky contrast, making stars hard to see.
2. Causes over-illumination of urban areas, masking astronomical features.

Light pollution doesn't just impact professional observatories but amateur stargazers as well. Solutions include using shields to direct light downward and employing low-intensity bulbs to minimize unnecessary illumination.

Atmospheric turbulence refers to the natural, constant movement within Earth's atmosphere. This movement is caused by the heated air rising and cooler air descending, creating a swirling effect. The turbulence affects the passage of starlight through the atmosphere, leading to a flickering appearance known as 'twinkling'.

• Alters the light path, causing blurriness on telescope captures.
• Affects image stability, impacting precise measurements.

Solutions like adaptive optics, which adjust the telescope optics in real time, help mitigate the effects of atmospheric turbulence.

Our atmosphere is full of various gases and particles, which absorb different wavelengths of light. This phenomenon, known as atmospheric absorption, restricts our visibility into certain electromagnetic waves. 1. **Limited wavelength observation:** The atmosphere blocks most ultraviolet (UV) and gamma rays, only allowing visible light, radio waves, and some infrared waves to pass through. 2. **Scope of study narrowed:** By blocking non-visible wavelengths, it limits astronomers' capability to study astronomical phenomena like high-energy radiation from distant galaxies or star-forming regions. Space telescopes, such as the Hubble Space Telescope, are key tools in bypassing atmospheric absorption, offering a clearer, broader view of the universe.