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Stage 4 of stellar evolution, which typically involves the fusion of heavier elements in massive stars, ends when the core iron collapses, leading to a supernova. This transition to stage 5, characterized by the remnants of supernovae or the formation of neutron stars or black holes, occurs within a few million years after stage 4 ends. Therefore, stage 4 ended and stage 5 began approximately a few million years ago in the life cycle of massive stars.
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Approximately how long ago did the current normal polarity begin?
3
How long is the caterpillar stage of a butterfly?
In about 10 days, you can see the larvae entering the Chrysalis stage.
Approximately how long ago did stage 4 end and stage 5 begin?
Stage 4 of demographic transition typically refers to a period of low birth and death rates, characterized by a stable population. This stage is often associated with developed countries and has been prevalent since the mid-20th century. Stage 5, which includes declining birth rates leading to potential population decrease, is a more recent phenomenon that has emerged in some countries over the last few decades. Thus, stage 4 ended and stage 5 began roughly in the late 20th to early 21st century.
How do the properties of long-lived stars compare to those of short-lived stars?
Long-lived stars are typically lower in mass, shine less brightly, and have longer lifespans compared to short-lived stars. Short-lived stars tend to be more massive, burn through their fuel more rapidly, and have shorter lifespans before evolving or ending in a supernova explosion.
What stars are the oldest red dwarfs white dwarfs red stars or giant stars?
The oldest stars are typically red dwarfs, which are small, cool, and faint stars that have long lifespans. White dwarfs are the remnant cores of low to medium mass stars, not the oldest. Giant stars are intermediate stage stars that have evolved away from the main sequence.
Does stage have a short or long vowel sound?
The A in stage has a long A sound as in cage and page. The E is silent.
How long is the toddler stage in a child's development and what are some key characteristics of this stage"?
The toddler stage in a child's development typically lasts from ages 1 to 3. During this stage, toddlers experience rapid physical and cognitive growth. They begin to walk, talk, and assert their independence. Tantrums, exploration, and developing language skills are common characteristics of this stage.
What is a Decline Stage in Marketing?
A decline stage is when sales begin to fall. A decline stage may be gradual or have a sudden drop and continue this way. Some decline stages may not continue for too long while others may decline to zero sales and stay at zero.
How long is a sidereal month?
A sidereal month is approximately 27.32 days long. It is the time it takes for the Moon to complete one orbit around the Earth with respect to the fixed stars.
Does the black dwarf have a satellite?
We don't think there are any black dwarf stars yet. There hasn't been long enough for them to cool to the "black" stage. When there has been, then presumably some of them will have satellites.
How long do stars stay?
Stars stay forever.
How can you ever begin to study stars life if they lived for a billion years?
Because the Universe is very big and light takes a finite time to reach us. So when scientist look at the stars, they are not seeing them as they are now, but as they where when the light left them. For example: Imagine a 1,000 stars all at the same stage of their life, but each one is a million light years further away than the last one. The furthest star would be a billion light years away, while the nearest is right next to us. By observing all the stars, we can see the stars evolution all the way back to 1 billion years ago, because the light has taken that long to reach us.
