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The John Deere 336 series baler was in production from 1972 until 1980.
The length of time that a star stays in the main sequence varies by a huge amount depending on its mass. The whole reason is much too long and complicated to be placed here. (You need to read an encyclopedia article on the different classes of the starts.) However, the simple summary is that the largest (and hottest) stars stay in the main sequence for the shorter lengths of time (like 10 million years), but the smaller and cooler stars (smaller than our Sun) stay in the main sequence for the longest lengths of time - billions and billions of years, really long, like 50 billion years. Our Sun is in between, and it has an estimated lifetime of about five billion years on the main sequence.
No, main sequence stars last more then a few hundred years. Depending on their mass main sequence stars may last anywhere from several million to several trillion years. Our sun is a main sequence star that is about halfway through its 10 billion year duration.
You must study in great depth for 50 years in the secret land of Clamidiab. It is there that you will learn the art of jumping to the complex number sequence where you will be able to identify the exact number that someone is thinking. To read minds you must study for an additional 80 years. Good luck.
The area would be in square units, in this case, square light-years. Use the formula for area of a sphere: area = 4 x pi x radius2. This will be in square kilometers, so divide twice the number of kilometers in a light-year to convert to square light-years.
10¹¹ years
Unanswerable in seconds unless you specifiy the starting date and time, since the possible number of leap years can vary depending on where they occur in the sequence, and the number of days in the last month and a half is variable depending on which months they include.
An O star will stay on the main sequence for millions of years whereas a M star can stay on the main sequence for billions and billions of years.
Yes, Proxima Centauri is a main-sequence star and will remain so for about another four trillion years.
At your stage of math education, you haven't learned how to handle the squareroot of any negative number yet, whether it's a whole number, a fraction, or adecimal.To indicate the square root of a negative number, temporarily ignore the minus sign,find the square root of the positive number, and then write the letter " i " next tothe answer. That shows that the number is imaginary, and in a few years, you'lllearn what that means and how to work with it.
About 10 billion years. We are 4.5 billion years in now.
About another 4.5 to 5 billion years