Question

Which of the following is NOT something that would lead astronomers to believe a black hole might be close-by in space?%0D%0A%0D%0A(1 point)%0D%0AResponses%0D%0A%0D%0Aan object that has gas and dust appear to be funneling around an object%0D%0A%0D%0Aan object that has gas and dust appear to be funneling around an object%0D%0A%0D%0Aan object that has spinning particles around an emptiness in space that emit x-rays%0D%0A%0D%0Aan object that has spinning particles around an emptiness in space that emit x-rays%0D%0A%0D%0Aan object that has height and depth but no width%0D%0A%0D%0Aan object that has height and depth but no width%0D%0A%0D%0Aan object in space with highly elevated temperatures

Answer 1

"An object that has height and depth but no width" is NOT a sign astronomers would use. It's a nonsensical/2D description. Astronomers look for things like gas/dust funneling into an unseen mass, X-ray emission from hot infalling gas, high temperatures and fast motions of nearby material — those are plausible indicators of a nearby black hole.