Radiation astronomy/Radars/Quiz

Radar astronomy is a lecture about a specific technique of sensing rocky or metallic astronomical objects. It is part of astrometric radiation astronomy, or astrometry.

Goldstone captured a new radar image of 2005 YU55 on 7 November 2011. Credit: NASA's Deep Space Network antenna in Goldstone (NASA/JPL-Caltech).

You are free to take this quiz based on radar astronomy at any time.

To improve your score, read and study the lecture, the links contained within, listed under See also, External links, and in the {{Principles of radiation astronomy}} template. This should give you adequate background to get 100 %.

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1 Which of the following are theoretical radiation astronomy phenomena associated with a star?

possible orbits
a hyperbolic orbit
nuclear fusion at its core
nuclear fusion in its chromosphere
near the barycenter of its planetary system
electric arcs
impact craters
radar signature

2 Yes or No, The rocky surface of the planet Venus can be detected when Venus is observed using infrared astronomy.


3 Which of the following is not a phenomenon associated with the planet Mars?

iron oxide
the MESSENGER spacecraft
meteorites on Earth
Olympus Mons

4 True or False, The position of the Sun can be determined directly with the use of radar astronomy.


5 The Sun as a planet has what property?

it's subject to lunar eclipses
it passes once a year through the Big Dipper
its interior structure has been studied with radar
optical reflectance studies have found evidence of magnesium
it has a surface temperature of ~700 K
it is a wanderer

6 Complete the text:

Terahertz radiation refers to electromagnetic waves propagating at

in the


7 Soon after the invention of radar astronomy, what classical planet was detected

8 Which types of radiation astronomy directly observe the rocky-object surface of Venus?

meteor astronomy
cosmic-ray astronomy
neutron astronomy
proton astronomy
beta-ray astronomy
neutrino astronomy
gamma-ray astronomy
X-ray astronomy
ultraviolet astronomy
visual astronomy
infrared astronomy
submillimeter astronomy
radio astronomy
radar astronomy
microwave astronomy
superluminal astronomy

9 Complete the text:

Astronomers place the submillimetre waveband between the


wavebands, typically taken to be between a few hundred micrometres and a millimetre.

10 Which of the following is involved in planetary astronomy more so than planetary science?

the occurrence of rock types on the surface of rocky objects
the Earth and other rocky objects may have a mantle
checking equations about complex systems
the advantages of radar
digging holes in the surface of the Moon
surface temperatures low enough to produce methane lakes


  1. Radar detection of the Sun may be possible at the right frequency.

See alsoEdit

External linksEdit

{{Radiation astronomy resource}}