Radiation/Meteors/Quiz

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The irregular galaxy NGC 1427A is passing through the Fornax cluster at nearly 600 kilometers per second (400 miles per second). Credit: NASA, ESA, and The Hubble Heritage Team (STScI/AURA).

Meteor radiation is a lecture and an article. It is also a new lecture for the astronomy department course on the principles of radiation astronomy.

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Quiz[edit]

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1. Why is much of the surface of Mars covered with red iron oxide dust when the rocks that compose much of its surface are blue or violet?

Mars has been systematically bombarded with small iron-nickel meteorites or micrometeorites that oxidize in its atmosphere
Mars has been frequently bombarded with hematite containing micrometeorites
asteroid impacts on Mars may have forced iron from near its core into the atmosphere and onto the surface as hematite dust that oxidized
Mars is like Earth in surface hematite composition, but Earth has much more water
precipitation from iron-rich water

2. Which of the following is not a radiation phenomenon associated with a comet?

airglow
elongated dust particles
high albedo
olivine
Rayleighs
coronal mass ejection

3. Which of the following are radiation phenomena associated with the apparent liquid-object Earth?

rain
snow
hail
neutron emission
polar coronal holes
meteor emission
rotation

4. Which of the following are radiation phenomena associated with the Sun as a likely source?

coronal clouds
cosmic rays
neutrinos
Oh My God type particles
meteors
comets
blue rays

5. Complete the text:

Match up the item letter with each of the cosmogonic possibilities below:
interior models of the giant planets - A
high interest for cosmogony, geophysics and nuclear physics - B
hierarchical accumulation - C
clouds and globular clusters - D
cosmic helium abundance - E
deuterium fusion - F
a large deficiency of light elements - G
after galactic-sized systems had collapsed - H
the motions of hydrogen
formation of luminous quasars .
stars with an initial mass less than the solar mass .
rotating liquid drops .
primordial is less than 26 per cent .
a solar mixture of elements dominated by hydrogen and helium gas .
around 13 Jupiter masses .
smaller rocky objects .

6. The charge on a planetary dust particle may change with?


7. Which radiation phenomena are most likely to interfere with observing stars?

a late-summer rainstorm
a clear sky
an approaching dust storm
below normal temperatures
a typhoon
a snow fall
fog

8. Various gaps and density minima have been observed in the Saturnian

system.

9. Which of the following are characteristic of a binary formed via gravitational fragmentation?

the local Jeans length
the local speed of sound
the mean molecular weight
the electron neutrino
the mean particle density
neutrons

10. Complete the text:

The Moon was formed independently of the Earth and later , presumably by a interaction.

11. Yes or No, A hydrometeor is a precipitation product.

Yes
No

12. Usually associated with clouds filling the sky, thunder and lightning, wind and what water based meteorites


13. True or False, A lithometeor is a rocky-object meteor.

TRUE
FALSE

14. Meteorites found on Earth may be from which of the following?

Saturn
Mercury
the Moon
the asteroid belt
Jupiter
Mars
Earth

15. True or False, A cryometeor is a very large chunk of amber.

TRUE
FALSE

16. Complete the text:

An aerometeor is a unit of air traveling or through an atmosphere.

17. True or False, A metallic or stony object that is the remains of a meteor is called a meteoroid.

TRUE
FALSE

18. On 19 May 1910, the Earth actually passed through the tail of what comet.


19. True or False, The observations of planetary motion agree with computed orbits to the accuracy of the observations.

TRUE
FALSE

20. A cloud at nearly a quarter of the distance to Proxima Centauri is called the


21. True or False, Clouds are a form of radiation because they have a temperature gradient.

TRUE
FALSE

22. Which phenomena are associated with the heliosphere?

a region of space where the interstellar medium is blown away by the solar wind
a bubble in space
virtually all the material emanates from the Sun itself
Voyager 2
Voyager 1
the termination shock

23. True or False, The prismoidal method provides a good approximation of the dust emission peak for cold sources.

TRUE
FALSE

24. A natural rocky source of chemicals from the sky to the ground may originate from what astronomical source?

Jupiter
the solar wind
the diffuse X-ray background
Mount Redoubt in Alaska
the asteroid belt
the International Space Station

25. Yes or No, A new cosmogony predicts that all particles in one stream have the same mineral composition.

Yes
No

26. Complete the text:

The majority of known asteroids orbit the Sun between the orbits of and .

27. True or False, Mars may have suffered asteroid impacts.

TRUE
FALSE

28. Which of the following are radiation phenomena associated with the gaseous-object Neptune?

Voyager 2
blue rays
clouds
neutron emission
polar coronal holes
meteor emission
rotation

29. True or False, The visible path of a meteoroid that has entered the Earth's atmosphere is called a meteorite.

TRUE
FALSE

30. Complete the text:

The 0.6 m Tortugas Mountain Observatory is used to monitor the temporal changes in the cloud deck and equatorial activity on .

31. True or False, Mercury may have once been a satellite of Jupiter, or possibly of Saturn.

TRUE
FALSE

32. Which of the following is not a characteristic of showers?

throwing a beam
meteors
rain
snow
hail

33. True or False, Micrometeoroids have less stable orbits than meteoroids.

TRUE
FALSE

34. Which of the following are radiation phenomena associated with the rocky-object Io?

surface regions reflecting or emitting violet or purple
an excess brightness at or near the edge
red regions that may be phosphorus
neutron emission
polar coronal holes
meteor emission
rotation

35. True or False, To date, all of the reported hypervelocity stars (HVSs), which are believed to be ejected from the Galactic center, are blue.

TRUE
FALSE

36. Any natural object radiating through a portion or all of a natural object's atmosphere may be called a what?


37. True or False, Olivine is a silicate mineral that may be detected in cometary coma dust with green astronomy.

TRUE
FALSE

38. Observations of comets have benefitted greatly from what phenomenon of cyan radiation?

Cherenkov radiation
the electric blue glow of lightning
gas-expansion velocity decreases with increasing heliocentric distance
methane possesses prominent absorption bands in the visible
adaptive optics
the light of the neutral CN-radical

39. True or False, A cometary orbit about the Sun is a radiation phenomenon.

TRUE
FALSE

40. Which of the following is not a radiation phenomenon associated with a planet?

airglow
elongated dust particles
high albedo
olivine
Rayleighs
coronal mass ejection

Your score is 0 / 0


Hypotheses[edit]

Main source: Hypotheses
  1. Meteors range in size from galaxy clusters to dust grains and molecular clusters.

See also[edit]

External links[edit]