What would you like to do?
What is an old star of average size that has begun to expand and cool as its fuel has began to run out?
a red giant :D
The correct way to say it is "summer has begun." This is the present perfect tense so it requires an auxiliary verb like "have" and the past perfect conjugation of "begin"… which is "begun." "Began" is the past tense of "begin," which is used by itself in a sentence.
A Red Giant or a Red Super Giant if it is very large.
Yes, pretty much so. The Sun is a little larger than the "average" visible star, but not by a whole lot. However, stellar theory proposes that there may be a large num…ber of "red dwarf" or even smaller "brown dwarf" stars which are very dim, and including all of these very tiny stars may push the "average" fairly low. This might put the Sun in the top third of all stars. It is worth noting that the closest star to the Sun is the red dwarf Proxima Centauri, which is so dim that it cannot be seen without a telescope. Distant red dwarf stars may be essentially invisible, even from the Hubble Space Telescope.
It turns into a white dwarf star, a neutron star or a black hole.
A star that has undergone expansion, deflation and cooling is known as a white dwarf, or degenerate dwarf. It is a small star made up of mainly electron-degenerate matter.…
Neither is correct. "Began" is the simple past tense of "begin". The race began at 7:00. "Begun" is the past participle of "begin". Past participles are used to create the …past, present, and future perfect tenses (along with the auxiliary verbs has, have, had, and will). Past perfect: I/we/you/he/she/it/they had begunPresent perfect: I/we/you/they have begun; he/she/it has begunFuture perfect: I/we/you/he/she/it/they will have begun "Is" can be used with the present participle (beginning) to create the third person singular, present progressive tense: he/she/it is beginning.
All stars that have left the main sequence. Typically red giants, but not always.
To start from the beginning, a stars "fuel" is initially H, or hydrogen the lightest element. A star is basically a nuclear reactor and fuses the H molecules together to form …He or helium (this process is called fusion) depending on the size of the star, it can fuse heavier and heavier elements and if you have a really big star it will make iron from fusion or a little star will burn out extremely slowly and make a brown dwarf. A big star could do a lot of things. It could go supernova and eventually form a black hole or it could become a quasar, to a few other things.
white dwarf a black dwarf
An average star like our own Sun is called a yellow dwarf.
when they run out of fuel they become neutron star.When they do have fuel it is called super nova.
a dwarf star
Most meteoroids that cause "shooting stars" are pebble-sized, a centimeter or so across.
If a star the size of the sun expands to form a gaint 20 times larger in radius by what factor will its average density decrease?
20 3 = 8000.. \n
the North star Any star that is in its red giant phase, as the fusion of helium creates so much energy that the star expands. Betelgeuse in the constellation Orion (bright s…tar located on Orion's right "shoulder") is an excellent example.