What does the acronym ORC stand for in astronomy?

Exploring Odd Radio Circles (ORCs)

Interactive Video
•
Science, Physics
•
9th - 12th Grade
•
Hard

Jackson Turner
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Orbital Radio Cloud
Odd Radio Circle
Optical Radio Cluster
Outer Ring Cluster
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many potential ORC candidates had been identified by early 2023?
Eight
Six
Four
Ten
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why are ORCs considered 'odd' in terms of their electromagnetic emissions?
They emit only in the radio spectrum.
They emit only in the infrared spectrum.
They emit only in the visible spectrum.
They emit only in the ultraviolet spectrum.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is one hypothesis about the origin of ORCs?
They are remnants of ancient planets.
They are formed by merging galaxies.
They are created by asteroid impacts.
They are remnants of dying stars.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What phenomenon is responsible for the strong radio signals emitted by ORCs?
Synchrotron radiation
Solar flares
Cosmic microwave background
Gamma-ray bursts
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is synchrotron radiation?
Sound waves in space
Heat emitted by stars
Light emitted by charged particles spiraling in magnetic fields
Radiation from nuclear reactions
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is one alternative theory about the nature of ORCs?
They are planetary rings.
They are cosmic dust clouds.
They are solar flares.
They are black hole radio jets.
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