Gravity is Not a Strong Enough Force to Confine the Nuclear Fusion Reactions of the Sun

a reply to: andy06shake

It is to far away to do any damage to us. What we will see is a good light show as it will be bright enough to see during the day.should be visible for about 2 weeks then fade away.

a reply to: dragonridr

Yeah by the looks of it we would need to be within 160 light-years of a supernova for it to harm us, my bad.

Big light show it is then, i hope.

Wonder if it would play havoc with our communication and satellite networks.

For comparison, the escape velocity of the earth is about 100,000 mph.

a reply to: TheSkepticGuy23


WRONG

Earth escape velocity is about 24,500 mph, 1/4 of that you posted

a reply to: firerescue

I thought the commonly accepted value was 25,020mph.

Splitting hairs all the same.

But you are correct it's not 100,000 mph.

Merry Christmas.

originally posted by: firerescue

For comparison, the escape velocity of the earth is about 100,000 mph.

a reply to: TheSkepticGuy23


WRONG

Earth escape velocity is about 24,500 mph, 1/4 of that you posted

A very easy way to calculate the escape velocity is to equate the kinetic energy with the gravitational potential energy to find the least value for which an object can escape from the earth's gravitational field. It gives you around 11.2Km/s which is the same as 40,320Km/h or around 25,059miles/h

originally posted by: andy06shake
a reply to: firerescue

I thought the commonly accepted value was 25,020mph.

Splitting hairs all the same.

But you are correct it's not 100,000 mph.

Merry Christmas.

That's true.
This value is almost 4 times the speed of the escape velocity.

originally posted by: TheSkepticGuy23
a reply to: zaderamsesholloway

One of the fundamental aspects of our understanding of gravity comes from its role in maintaining Earth's atmosphere.

That's not correct. Our fundamental understanding of gravity comes from observing our solar system.

The sun is a massive, hot ball of plasma, inflated and heated by energy produced by nuclear fusion reactions at its core. The surface gravity of the sun is 28 times that of the earth, with an escape velocity of 615 km/s, or about 1.4 million mph, about 50 times the velocity of hydrogen observed on the surface of the sun. For comparison, the escape velocity of the earth is about 100,000 mph.

While gravity is often called a "weak force," it's what binds the universe and everything together.

…aaaand THAT’S not correct. Escape velocity here on Earth is right at 11.2km/s (40320.00kph) or just shy of 25054mph. Roughy 1/4th of what you stated.

a reply to: andy06shake

You are right figure I posted is for lunar missions , moon is still within earth gravitational sphere and do not need to reach escape velocity and because moon has its own significant gravity to pull the spacecraft in

a reply to: firerescue

Earth escape velocity is about 24,500 mph, 1/4 of that you posted

For lunar missions, you are correct.

To completely escape the earth/moon gravity well on a vector outside the solar system, 100,000 mph is the number.

originally posted by: TheSkepticGuy23
a reply to: firerescue

Earth escape velocity is about 24,500 mph, 1/4 of that you posted

For lunar missions, you are correct.

To completely escape the earth/moon gravity well on a vector outside the solar system, 100,000 mph is the number.

When you said escape velocity everyone understood you meant the lowest possible velocity needed to escape earth's gravitational attraction.

a reply to: zaderamsesholloway

You completely neglected the strong nuclear force which is responsible for binding nucleons together. The strong nuclear force has a very short range.