Will the sun get hotter?

The hotter surface temperature would have two main consequences: The total energy radiated from the Sun would increase (and so Earth would get hotter), and the wavelength of the light that comes from the Sun would decrease (the Sun would become more blue).

The Sun is about 4.6 billion years old – gauged on the age of other objects in the Solar System that formed around the same time. Based on observations of other stars, astronomers predict it will reach the end of its life in about another 10 billion years.

A relatively simple calculation would show that the Earth’s surface temperature would drop by a factor of two about every two months if the Sun were shut off. The current mean temperature of the Earth’s surface is about 300 Kelvin (K). This means in two months the temperature would drop to 150K, and 75K in four months.

Scientists have conducted a lot of researches and study to estimate that the Sun is not going to explode for another 5 to 7 billion years. When the Sun does cease to exist, it will first expand in size and use up all the hydrogen present at its core, and then eventually shrink down and become a dying star.

Today, we know from radiometric dating that Earth is about 4.5 billion years old. Had naturalists in the 1700s and 1800s known Earth’s true age, early ideas about evolution might have been taken more seriously.

After the Sun exhausts the hydrogen in its core, it will balloon into a red giant, consuming Venus and Mercury. Earth will become a scorched, lifeless rock — stripped of its atmosphere, its oceans boiled off. Astronomers aren’t sure exactly how close the Sun’s outer atmosphere will come to Earth.

What if the Sun turned into a black hole? The Sun will never turn into a black hole because it is not massive enough to explode. Instead, the Sun will become a dense stellar remnant called a white dwarf.

It is the pull of the Moon’s gravity on the Earth that holds our planet in place. Without the Moon stabilising our tilt, it is possible that the Earth’s tilt could vary wildly. It would move from no tilt (which means no seasons) to a large tilt (which means extreme weather and even ice ages).

Consider this: if the sun was to disappear for exactly five seconds it would be 8.2 minutes AFTER the fact before anyone on Earth would even know that it had happened, so by the time we were aware the event would have passed.

By that point, all life on Earth will be extinct. The most probable fate of the planet is absorption by the Sun in about 7.5 billion years, after the star has entered the red giant phase and expanded beyond the planet’s current orbit.

The edge of the Earth closest to the black hole would feel a much stronger force than the far side. As such, the doom of the entire planet would be at hand. We would be pulled apart.

“There is no danger of the Earth (located 26,000 light years away from the Milky Way’s black hole) being pulled in. … But collisions won’t happen indefinitely because the universe is big and because it’s expanding, and so it’s very unlikely that any sort of black hole runaway effect will occur.”

Earth’s first animal was the ocean-drifting comb jelly, not the simple sponge, according to a new find that has shocked scientists who didn’t imagine the earliest critter could be so complex.

According to Jewish tradition, Adam and Eve had 56 children. This was possible, in part, because Adam lived to be 930 years old. Some scholars believe that the length of the life spans of the people of this time was due to a vapor canopy in the atmosphere.

The First Humans One of the earliest known humans is Homo habilis, or “handy man,” who lived about 2.4 million to 1.4 million years ago in Eastern and Southern Africa.

While our planet as a whole may never run out of water, it’s important to remember that clean freshwater is not always available where and when humans need it. … More than a billion people live without enough safe, clean water. Also, every drop of water that we use continues through the water cycle.

By the year 1 trillion, the accelerating universe will have infinitely stretched the light from all external galaxies – assuming dark energy truly is Einstein’s cosmological constant and not an unstable field that winds up destroying the universe. … Their existence will show that the universe cannot be eternal.

Human extinction is the hypothetical end of the human species due to either natural causes such as population decline due to sub-replacement fertility, an asteroid impact or large-scale volcanism, or anthropogenic (human) causes, also known as omnicide.

Will the Sun become a black hole? No, it’s too small for that! The Sun would need to be about 20 times more massive to end its life as a black hole. … In some 6 billion years it will end up as a white dwarf — a small, dense remnant of a star that glows from leftover heat.

We are not getting closer to the sun, but scientists have shown that the distance between the sun and the Earth is changing. … The sun’s weaker gravity as it loses mass causes the Earth to slowly move away from it. The movement away from the sun is microscopic (about 15 cm each year).

Extinction. Unless the human species lasts literally forever, it will some time cease to exist. In that case, the long-term future of humanity is easy to describe: extinction. An estimated 99.9% of all species that ever existed on Earth are already extinct.

In the early days of research on black holes, before they even had that name, physicists did not yet know if these bizarre objects existed in the real world. The original idea of a wormhole came from physicists Albert Einstein and Nathan Rosen. …

The birth of our universe may have come from a black hole. Most experts agree that the universe started as an infinitely hot and dense point called a singularity. … It is, in fact, and some physicists say they could be one and the same: The singularity in every black hole might give birth to a baby universe.

Time freezes at the event horizon and gravity becomes infinite at the singularity. The good news about massive black holes is that you could survive falling into one. Although their gravity is stronger, the stretching force is weaker than it would be with a small black hole and it would not kill you.

The Earth’s orbit could be stable if the planet rotated around the two stars. The stars would have to be close together, and the Earth’s orbit would be further away. … Most likely, beyond the habitable zone, where the heat of the suns wouldn’t be enough to keep our water in a liquid state.

If Earth had two moons, it would be catastrophic. An extra moon would lead to larger tides and wipe out major cities like New York and Singapore. The extra pull of the moons would also slow down the Earth’s rotation, causing the day to get longer.

At the Equator, the earth’s rotational motion is at its fastest, about a thousand miles an hour. If that motion suddenly stopped, the momentum would send things flying eastward. Moving rocks and oceans would trigger earthquakes and tsunamis. The still-moving atmosphere would scour landscapes.

And without sunlight, the Earth would get very, very cold. Earth’s surface temperature now averages about 57 degrees Fahrenheit, but by the end of the first week without the sun, the average surface temperature would be below the freezing point.

It’s relatively cool with an average annual temperature of -60 degrees Celsius, but Mars lacks an Earth-like atmospheric pressure. Upon stepping on Mars’ surface, you could probably survive for around two minutes before your organs ruptured.

If the sun disappeared for ONLY ONE SECOND, nobody would notice anything other than no light for a single second. Nothing else. Our orbit would change by less than 1 Km as I’ve shown.

In the year 1 million, Earth’s continents will look roughly the same as they do now and the sun will still shine as it does today. But humans could be so radically different that people today wouldn’t even recognize them, according to a new series from National Geographic.

In the case of black holes, the pull is so strong that nothing – not even light – can escape. A black hole is so massive that time itself starts to warp. You wouldn’t feel anything different as you fell in, but to anyone watching, you would appear to slow.

For a comparison, Sagittarius A, the supermassive black hole at the center of the Milky Way, is thought to be about 4 million times the mass of the sun. In addition to being among the smallest black holes ever seen, it’s the nearest one to us that we know of, at just 1,500 light years away.

Getting swallowed by another black hole is same as small black hole swallowing a larger one, it just gets bigger contrary to getting destroyed. Only way to destroy a black hole is to explode it so that it’s no longer a black hole. Black hole’s singularity is a point space.

Answer: It is a matter of relative scale. A single Black Hole, even one at the center of our Milky Way galaxy, is just too small to eat an entire galaxy. …

At the center of a black hole, it is often postulated there is something called a gravitational singularity, or singularity. This is where gravity and density are infinite and space-time extends into infinity. Just what the physics is like at this point in the black hole no-one can say for sure.