Do scientists know how many supernovae are occurring per second or hour or day in our entire universe?
No.
The sensitivity and capability of the equipment we use determines our capacity to find a supernova.
In that regard, the Hubble was a huge advancement for us, and the James Webb spacecraft, which will replace it, will be even more so.
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The observable universe is thought to produce one supernova every second on average, though this number can fluctuate over time and between different regions of the universe.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
- How does the death of a massive star differ from the death of a sun-like star?
- How does a massive star die?
- In a main sequence star the gravity of the core is balanced by the outward pressure of the heat created by fusion of hydrogen atoms, maing it stable. So when the hydrogen is used up, does the star expeand to form a red giant because the outward pressure?
- What keeps chemical reactions from taking place in a black hole as it attracts objects into it?
- Scenario: A large solar event disrupted our satellites. Describe the name the solar event. How did it affect the satellites? What was the fallout from this event on Earth

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