Question

1. Describe the early history of the Sun. What did it start as? What lead to it becoming a smallish main sequence star? 2. Describe the future of the Sun. Roughly how long will it take for the Sun to leave the main sequence? What will happen when it leaves the main sequence? Will the Sun go supernova? 3. The remnants of stars 25 to 40 times more massive than the Sun may have such a strong _______ pull that their escape speeds exceed the speed of _______ , resulting in a _______. 4. The ________________ of a star (determined after observing the star 6 months apart) can be used to determine the distance to a star, but it is only effective for the closest stars to us. 5. what process is energy produced in the core of the Sun (and other stars as well)? Be as specific as possible.

Answer 1

1.) The sun was born about 4.6 billions years ago scientists think that sun is formed from a gaint rotating closed of gas an dust known as solar Neblur. As the neblur collapsed under its own gravity it soin faster and falttened into a disk, most of the material was pulled towards the center from the sun.

2.) The life expectancy of sun started generally 4.6 billion years prior, and will proceed for about another 4.5 – 5.5 billion years, when it will exhaust its supply of hydrogen, helium, and breakdown into a white diminutive person.

The Sun, as most stars in the Universe, is on the principle arrangement phase of its life, amid which atomic combination responses in its center circuit hydrogen into helium. Consistently, 600 million tons of issue are changed over into neutrinos, sun based radiation, and about 4 x 1027 Watts of vitality. For the Sun, this procedure started 4.57 billion years prior, and it has been creating vitality along these lines each since.

In any case, this procedure can't keep going forever since there is a limited measure of hydrogen in the center of the Sun. Up until this point, the Sun has changed over an expected multiple times the mass of the Earth into helium and sun powered vitality. As more hydrogen is changed over into helium, the center keeps on contracting, permitting the external layers of the Sun to draw nearer to the inside and experience a more grounded gravitational power.

This spots more weight on the center, which is opposed by a subsequent increment in the rate at which combination happens. Fundamentally, this implies as the Sun keeps on using hydrogen in its center, the combination procedure accelerates and the yield of the Sun increments. At present, this is prompting a 1% expansion in radiance each 100 million years, and a 30% expansion through the span of the last 4.5 billion years.

In 1.1 quite a while from now, the Sun will be 10% more splendid than it is today, and this expansion in radiance will likewise mean an expansion in warmth vitality, which Earth's climate will retain. This will trigger a clammy nursery impact here on Earth that is like the runaway warming that transformed Venus into the frightful condition we see there today.

In 3.5 quite a while from now, the Sun will be 40% more brilliant than it is at the present time. This expansion will make the seas heat up, the ice tops to for all time dissolve, and all water vapor in the air to be lost to space. Under these conditions, life as we probably am aware it will be unfit to endure anyplace superficially. To put it plainly, planet Earth will come to be another hot, dry Venus.one day in the far off future, the Sun will come up short on hydrogen fuel and gradually slump towards death. This will start in surmised 5.4 billion years, so, all in all the Sun will leave the fundamental arrangement of its lifespan.With its hydrogen depleted in the center, the dormant helium fiery debris that has developed there will end up shaky and breakdown under its own weight. This will make the center warmth up and get denser, making the Sun develop in size and enter the Red Giant period of its advancement. It is determined that the extending Sun will develop sufficiently vast to envelop the circle's of Mercury, Venus, and perhaps Earth. Regardless of whether the Earth endures, the extraordinary warmth from the red sun will sear our planet and make it totally unthinkable for life to endure.

When it achieves the Red-Giant-Branch (RGB) stage, the Sun will haves roughly 120 million years of dynamic life left. However, much will occur in this measure of time. To start with, the center (loaded with savage helium), will light brutally in a helium streak – where around 6% of the center and 40% of the Sun's mass will be changed over into carbon inside merely minutes.

Throughout the following 20 million years, the Sun will at that point become temperamental and start losing mass through a progression of warm heartbeats. These will happen at regular intervals or somewhere in the vicinity, increasing each time and expanding the Sun's iridescence to multiple times its present splendor and its sweep to more than 1 AU.

t this point, the Sun's extension will either include the Earth, or abandon it completely aloof to life. Planets in the Outer Solar System are probably going to change drastically, as more vitality is ingested from the Sun, causing their water frosts to sublimate – maybe shaping thick climate and surface seas. Following 500,000 years or something like that, just 50% of the Sun's present mass will remain and its external envelope will start to frame a planetary cloud.

The post-AGB development will be significantly quicker, as the catapulted mass winds up ionized to shape a planetary cloud and the uncovered center achieves 30,000 K. The last, bare center temperature will be more than 100,000 K, after which the leftover will cool towards a white midget. The planetary cloud will scatter in around 10,000 years, however the white diminutive person will make due for trillions of years before blurring to dark.

3.) Scape speed is the speed that an object (even light) needs to be traveling to break free of that planet gravity well and leave it without further propulsion. Gravitational pull is directly related to the mass of star. So giant star pulls the object (even light) to become back hole.

So, The remnants of stars 25 to 40 times more massive than Sun may have very such a strong Gravitational pull that their escape speeds exceed the speed of Light ,resulting in a Blackhole.

4.)The most basic technique to calculate the distance is parallax, Once a star's parallax is known, its distance from Earth can be computed trignometrically. But the more distant an object is, the smaller its parallax.

so, The Steller parallax of a star (determined after observing the star 6 months apart) can be used to determine the distance to a star, but it is only effective for the closest stars to us.

5.) Energy is produced at the core of the solar via the method of nuclear fusion, core is ready 20 to twenty-five% of the radius of the sun, and a temperature of 15.7 Million kelvin. Hydrogen is converts to helium via this process and an massive energy is produced as a byproduct. It creates a completely high out ward pressure on the center and which is balanced via the compression by way of the gravity. Increase or lower of any of this pressure will consequences in crumble or explosion of solar. Ninety nine% of the electricity is produced on the core and it transmit thru many layers and come out as spectrum of radiations.