For the same reason that it's quite possible to get a letter in the mail today from
an old friend who passed away last week.
It takes light time to travel from the star to you. From the sun, it only takes
8 minutes, but from the next nearest star, it takes 4 years, and you can see
at least one object in the sky with your naked eyes whose light took over
2 million years to get here.
That light is what you're seeing. Nobody has any idea what might have happened
to that object since then, or whether it even still exists.
Yes, stars can exist outside of a galaxy. These stars are typically referred to as intergalactic stars, and they may have been ejected from their original galaxy due to interactions with other stars or galactic dynamics. Intergalactic stars are typically found in the space between galaxies.
Your friend's reasoning is flawed because while gravity does pull particles together, stars are in a state of hydrostatic equilibrium where the inward pull of gravity is balanced by the outward pressure generated from nuclear fusion in their cores. As stars burn their nuclear fuel, they can expand or contract depending on the balance of these forces, but they do not continuously shrink over time. Additionally, stars can undergo changes in size throughout their life cycles, such as expanding into red giants before eventually shedding their outer layers or collapsing into white dwarfs or other end states.
Elements which exist in stars exist also in humans, the concentrations are very different. An exception is helium, an element without biological significance.
The fourth state of matter is plasma. Plasma is an ionized gas where the atoms have lost or gained electrons, resulting in a collection of positively and negatively charged particles that are no longer in a neutral state. Plasma is commonly found in stars, lightning bolts, and fluorescent lighting.
All the stars are fixed to a sphere, which rotates once in 24 hours.
This is possible because the Sun shines on the dead star making it bright when you see it from Earth. :-)
Small stars live longer
The stars you see at night still exist.
Yes, stars really exist. One example of a star is the sun in our solar system.
Stars that don't exist still stay in the sky because the light that we're seeing in the sky is about 10 years old because it takes so long for the light to get here due to the stars being billions of miles away
They "shape" the universe into being what it is. (Change any of them and we would no longer exist. Not just us, but the stars and planets would be gone.)
Yes, stars can exist outside of a galaxy. These stars are typically referred to as intergalactic stars, and they may have been ejected from their original galaxy due to interactions with other stars or galactic dynamics. Intergalactic stars are typically found in the space between galaxies.
At the centre of stars.
The bigger the star, the faster it dies. Super-massive stars like Betelgeuse, the red supergiant at the shoulder of Orion, probably don't exist much longer than a few hundred thousand years. Our Sun will exist for about 9 billion years before it expands into a red giant. Tiny red dwarf stars can exist for tens of billions of years or more.
All around us.
nout
larger stars have longer lives, because as stars burn they are slowly burning up fuel and begin to cave in on themselves. the larger, the more fuel, the more fuel, the longer lasting.