Buzz
Space might seem calm, a quiet expanse filled with breathtaking images of faraway galaxies and colorful nebulae. Yet, the reality is far stranger and more violent than one might imagine, leaving even seasoned scientists startled and unsettled. Some of these catastrophic events are predicted to take place relatively nearby and could occur while humanity is still around.
10. The Ringed Mars
Recent studies have revealed that Mars could one day destroy its closest moon, Phobos. Measuring only 22 kilometers (14 miles) in diameter, Phobos is one of two moons orbiting the Red Planet. With each passing century, its orbit tightens, drawing it 2 meters (7 feet) closer to Mars.
In the end, Phobos will break apart due to the tidal forces exerted by Mars, though this process could span up to 40 million years. Once the moon is gone, Mars will be left with a ring system similar to Saturn's.
Over the next few million years, fragments of Phobos will fall onto Mars' equator. This could become a significant issue for any future human settlements in the region—assuming humanity is still around by then.
However, this impending event captivates scientists today. Phobos is an exceptional moon in our solar system, part of a rare group of moons that meet their end by spiraling too close to their parent planets.
Phobos is the last surviving member of this group. Its eventual demise could offer researchers valuable insights into the early solar system and the fate of other moons that have already met their end.
9. The Disintegrating Moon
In the far-off future, our Moon is expected to transform into a ring around Earth. Fortunately for fans of the Moon and werewolves everywhere, this event is still five billion years away.
Unlike Phobos, the force responsible for the Moon’s demise isn’t Earth itself but the fiery star at the center of our solar system. Though the Sun is stable now, it will eventually enter its red giant phase, likely causing the Moon to disintegrate.
The Moon is currently drifting away from Earth at a rate of 4.0 centimeters (1.5 inches) per year. However, during the Sun’s red giant phase, its expanding atmosphere will push the Moon so close to Earth that the resulting tidal forces will tear it apart.
A massive ring of lunar debris—spanning about 37,000 kilometers (23,000 miles)—will encircle Earth in a fashion similar to Saturn's famous rings. Like Phobos, this lunar ring will eventually vanish as the debris falls back to Earth.
8. Milkomeda
The Milky Way is on a collision course with its neighboring galaxy, Andromeda. The collision will have catastrophic results for both galaxies, meaning the Milky Way as we know it has only about four billion years left.
Gravity is pulling the Milky Way and Andromeda together at a breathtaking speed of 402,000 kilometers per hour (250,000 mph). When these two spiral galaxies collide, they will merge to form a completely new galaxy.
This cosmic collision will be an extraordinary event, lasting a staggering one billion years. During this time, the galaxies will undergo a dramatic dance—approaching, retreating, and reconnecting in a continuous cycle until the merger is complete.
Despite the abundance of stars in these galaxies, scientists believe that star collisions are extremely unlikely. As a result, the creation of the new galaxy—named “Milkomeda” by astronomers—will not result in the destruction of Earth or our solar system.
However, by that time, the Sun will have become so hot that Earth's oceans will have evaporated. Milkomeda will appear as a reddish elliptical galaxy, with Earth positioned on its outermost edge along with the rest of our solar system.
7. The Deadly Cloud
Simulations suggest that our solar system might eventually pass through a lethal cosmic fog. The microscopic particles within this cloud could pose a deadly threat to all life on Earth.
When this deadly cloud of dust and gas approaches, it won’t make a dramatic entrance. It won’t obscure the Sun or creep toward the solar system with a foreboding black storm.
The real danger is in its density. This cloud, at least 1,000 times more massive than anything Earth is currently passing through, will exert a physical force. It will push back the Sun's protective heliosphere, which shields us from harmful cosmic rays and other space hazards.
When the cloud reaches Earth, the dust and gas could strip the oxygen from our atmosphere. Cosmic rays will bombard the planet, unleashing deadly radiation that threatens all living organisms.
This disaster is one of the closest threats in terms of time. Scientists estimate it's less than four light-years away. In cosmic terms, that's a mere moment. But in human years, this destructive cloud is still a few millennia in the future.
6. The Carrington Event Revisited
On September 1, 1859, amateur astronomer Richard Carrington observed the most catastrophic solar storm ever recorded. Known as the Carrington Event, it unleashed a coronal mass ejection (CME) that struck Earth directly.
At the time, the only damage was to telegraph systems. However, in today's world, a recurrence of the Carrington Event would trigger a disaster of unprecedented proportions. The power grid could be destroyed, leaving millions of homes and businesses without electricity. Damaged electrical systems and transformers might take months to repair or replace.
Financial recovery from such an event could stretch for years. The storage and distribution of food and medicine would become nearly impossible. All electrical services, including communication systems, could be disrupted or entirely shut down.
Alarmingly, there have been a few close calls. In 2012, Earth narrowly avoided catastrophe when a CME, stronger than the Carrington Event, missed us by about a week. Had the storm occurred earlier, scientists believe the damage would still be affecting society today.
Modern society is especially vulnerable due to its heavy reliance on electricity. Unfortunately, CMEs can’t be redirected or even detected until about an hour before impact.
Between 1996 and 2010, solar scientists recorded 15,000 CMEs. They believe that it’s only a matter of time—potentially within the next decade—before a CME as powerful as the Carrington Event strikes Earth.
5. Death Stars
A massive cloud of comets, known as the Oort cloud, forms a protective “bubble” around our Sun. If a star were to pass through the Oort cloud or come close enough for its gravitational pull to disturb objects within, these displaced objects could spiral into the inner solar system and potentially cause chaos among the planets.
Scientists have now discovered several “death stars” on a trajectory toward the Oort cloud. The most perilous of these, an orange dwarf named HIP-85605, has a 90 percent chance of passing through the Oort cloud. Fortunately, this event is still over 240,000 years away.
Another star, Gliese 710, shares the same likelihood and is expected to approach in about one thousand years. To make matters more interesting, 12 more stars are predicted to swing by our solar system in a similar manner within the next two million years.
Although the likelihood of an Oort object colliding with Earth is low, it is not entirely out of the question. Two impact craters on Earth are thought to be linked to the star HIP103738, which passed near the Sun nearly four million years ago.
4. Parasitic Dwarf
Located about 3,260 light-years from our solar system—a relatively short distance in cosmic terms—a binary star system called T Pyxidis features a Sun-like star and a white dwarf engaged in a parasitic relationship.
The white dwarf is a volatile parasite that siphons hydrogen-rich gas from its companion star, leading to thermonuclear eruptions every 20 years. In terms of threat to Earth, these explosions are relatively harmless—like popping bubble wrap.
The real danger will come when the white dwarf reaches a critical mass from its companion. The resulting supernova will be so powerful that it could obliterate the white dwarf and release enough energy—equal to 1,000 solar flares—to threaten Earth, potentially damaging the ozone layer with gamma rays triggering the buildup of nitrous oxides in our atmosphere.
Scientists predict that the violent demise of the white dwarf will happen in approximately 10 million years. However, if the dwarf star gathers mass at a quicker rate than expected, the explosion could occur earlier.
3. Wolf-Rayet Star
In the constellation Sagittarius, a fiery spiral known as WR 104 harbors two stars at its core, orbiting each other as they near the end of their life cycles, posing a potential threat to Earth that could wipe out life similar to the fate of the dinosaurs.
Both stars are fated to explode as supernovae, and one of them is already in the final stages before its stellar collapse. This type of star is known as a Wolf-Rayet, and it’s essentially a ticking time bomb in the vastness of space.
This specific Wolf-Rayet star may detonate as a supernova within the next few hundred thousand years. Due to its proximity, it could unleash gamma rays toward Earth. These gamma ray bursts, thought to be the most powerful explosions in the universe, release more energy in a single minute than the Sun will ever generate over its 10-billion-year life span.
Since gamma rays travel at the speed of light, we won’t see them coming. Despite the WR 104 spiral system being about 8,000 light-years away, its effects could still be devastating for Earth. If those gamma rays hit, they could cause mass extinctions, agricultural collapse, acid rain, and widespread famine for the survivors.
A cooler climate and a weakened ozone layer would permit more harmful ultraviolet rays to penetrate our atmosphere. Anyone on Earth facing the blast would be exposed to radiation comparable to a nuclear explosion, resulting in radiation sickness.
2. The Big Change
Scientists theorize that there are several ways the universe could disappear forever. While many of these scenarios may unfold long after humanity has vanished, one possibility, known as the Big Change, might occur sooner.
It’s similar to a basic experiment with water. If both the water and the container are exceptionally clean, the water won’t freeze, even if it’s kept just below the freezing point.
In this state, the water is supercooled but remains liquid, as it requires something to form ice around. If you drop an ice cube into the water, it will instantly freeze. The universe may exist in a comparable supercooled state, but in terms of its vacuum.
Quantum physics asserts that even perfect vacuums contain a small amount of energy. However, the real danger lies in vacuums with significantly less energy. If two such vacuums, with different energy levels, come into contact, the outcome would be disastrous.
Much like the water, our universe—being the vacuum with more energy—is waiting for a trigger that could alter its fundamental nature. If a lower-energy vacuum were to form, it would rapidly create a bubble that expands at the speed of light, annihilating everything it touches—humans, galaxies, and the entire universe.
1. Planetary Collision
The orbital trajectories of planets are not fixed and grow even more unpredictable over time. When scientists conducted computer simulations to examine future planetary movements, they stumbled upon something both surprising and slightly unsettling.
In a few billion years, there’s a small chance that planets in our solar system could crash into each other. The orbit of Mercury around the Sun may expand enough to intersect with Venus’s path. If this happens, Mercury could be sent spiraling into the Sun, ejected from the solar system, or possibly even collide with Earth.
In an analysis where researchers simulated 2,500 different planetary orbits, only 25 scenarios suggested a catastrophic destabilization of Mercury’s orbit. Furthermore, even if Mercury were to collide with Venus or the Sun, the other planets would remain unaffected.
In an even rarer event, Mercury’s orbit might be disrupted by the gravitational pull of Jupiter. This could set off a chain reaction, destabilizing Mars and turning it into an indirect threat to Earth. If Mars passes too close to Earth, it could trigger a devastating Earth-Venus collision by disturbing Venus’s orbit.
