Category Archives: Black Holes

Can Black Holes Explode?

Question:  Can a black hole explode?  – Dirk Answer:  Black holes don’t really “explode”, which implies that they generate a large outburst of energy which ultimately tears them apart, but they do have outbursts (also, unfortunately, referred to as “explosions”).  … Continue reading

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Can Gravitationally-Lensed Objects be Studied at Any Wavelength?

Question:  As per definition, Gravitational lensing refers to bending of light rays from a distant source around a massive object (Galaxy cluster) which tends to magnify the background light source. If visible light rays bend around those massive objects then … Continue reading

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What is the Critical Mass at Which a Star Becomes a Black Hole?

Question:  How do you calculate the critical mass for a star to become a black hole? I’m an undergraduate Math major, and this is my senior thesis and I really have no idea where to start.  – Lauren Answer:  An … Continue reading

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Top Achievements for the NRAO Very Large Array

Question:  I’m embarrassed to ask this, as I feel after working here for so long I should already know the answer. But here it is: What are the top 3 discoveries/achievements of the VLA? And why?  — Doug Answer:  As … Continue reading

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Will Dark Energy Tear Apart Black Holes?

Question:  Will dark energy eventually tear apart black holes, especially supermassive black holes?  – Reinaldo Answer:  Let’s start with a basic understanding what what Dark Energy is thought to be.  It is a hypothetical form of energy which is thought … Continue reading

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Properties of Stars which Result in Black Holes

Question:  I have just been watching a very interesting programme on the television about scientists  who are studying the super massive black hole in the centre of our Milky Way galaxy. It was stated that that black holes are formed … Continue reading

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The Life Cycle of a Black Hole

Questions: Please may I ask some questions regarding black holes: – David Have black holes always existed ever since the “Big Bang”? What happens if two black holes were to collide, do they destroy one another or merge into an … Continue reading

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What Does a Black Hole Look Like?

Question: I would like to know what would show that a black hole was moving farther away from you?  My specific wonders would be how light around the hole would act, how its shape would change, or if the black … Continue reading

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Black Hole Basics

Question:  I think I know what is in black holes [and] why black holes are black, because they swallow everything, even light? Well my theory is that nothing but what the black hole sucked in is in there and that … Continue reading

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Can Black Holes Swallow Other Black Holes?

Question:  Can a black hole be swallowed by a super massive black hole? And if it could, how would we be able to see it?  – Shayna Answer:  Yes.  If such an event occurred, and we were looking in the … Continue reading

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