The reason why the presence of dusty disks were surprising is because; A) such systems could not have formed planets.
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What is a dusty disk?</h3>
A dusty disk is a circumstellar disk of dust and debris found in the orbit around a star and sometimes these disks contain prominent rings.
Now, these disks around young stars are made up of 99% gas and 1% dust and this small amount of dust is still sufficient to make the disks opaque and dark at visible wavelengths.
Now, the dust may be 1% but it is 1 million times more than that found in our solar planets and it orbits at a distance from the star that is similar to the orbits of Earth and Venus around our own Sun.
The missing options are;
A) such systems could not have formed planets.
B) their composition differs so much from their stars.
C) their instruments were not thought to be powerful enough to make such a measurement.
D) gas and dust should be rapidly ejected into space by the radiation from a hot star.
Read more about Dusty Disks at; brainly.com/question/25624188
Eat more vegetables
They are healthy so it will decrease getting diseases and the other options don’t help decrease the chances
A would be the correct answer
Answer:
For centuries, Aleppo was one of the major cities of the Ottoman Empire, alongside Constantinople and Cairo. With a population of over 2 million, it was Syria’s largest-populated city before the dawn of the Syrian Civil War, which broke after the revolution of 2011.
sry this is all i really know BUT HOPE IT HELPS !!!! :0
Explanation:
