ASP Observational Techniques and Telescopes

Question 1

What is the main advantage of a reflecting telescope over a refracting telescope?

Accepted Answer

Reflectors avoid chromatic aberration and can be made larger without distortion

Answer

Reflectors are cheaper to manufacture

Answer

Reflectors have better color contrast

Answer

Reflectors are more portable

Question 2

What is the purpose of adaptive optics in ground-based astronomy?

Accepted Answer

To correct for atmospheric distortion in real-time, producing sharper images

Answer

To magnify faint objects digitally

Answer

To block out bright stars to reveal nearby planets

Answer

To extend the wavelength range of optical telescopes

Question 3

What is the resolving power of a telescope?

Accepted Answer

The ability to distinguish two closely spaced objects as separate

Answer

The maximum magnification achievable

Answer

The brightness of the image produced

Answer

The range of wavelengths the telescope can detect

Question 4

What is interferometry in radio astronomy?

Accepted Answer

Combining signals from multiple separated telescopes to achieve the resolution of a much larger single dish

Answer

A technique to filter out radio frequency interference from satellites

Answer

Using interference patterns to measure stellar distances

Answer

A calibration method for individual radio dishes

Question 5

What is the transit method of exoplanet detection?

Accepted Answer

Measuring the dimming of a star's brightness as a planet passes in front of it

Answer

Detecting the wobble a planet causes in its host star

Answer

Using gravitational lensing to detect planetary companions

Answer

Direct imaging of planets around nearby stars

Question 6

What is spectroscopy used for in astronomy?

Accepted Answer

Analyzing the spectrum of light to determine composition, temperature, velocity, and other properties

Answer

Measuring the angular diameters of stars

Answer

Taking high-resolution images of solar system objects

Answer

Measuring the polarization of light from stars