Imagine that a rival astronomer proposes that your mysterious object is actually the mouth of a wormhole to another dimension. The rival astronomer calculates that the wormhole mouth would need to be 10^13 m in diameter and would last for around a thousand years.
Which one or more of the following observations would disprove the rival astronomer's theory?
Variability on a timescale of 100 seconds
A redshift of 10.3
A spectrum that rises to shorter wavelengths
Jets that are a mega-parsec in length
1 answer
the last one is wrong