https://www.livescience.com/64572-planetary-collision-life-earth.html
But a new study finds that this event could have had a much larger impact than previously thought. The collision could also have imbued our planet with the carbon, nitrogen and sulfur needed for

https://www.youtube.com/watch?v=1LdeBY9uNUg
Last time a stray planetoid the size of Mars smashed into Earth, it scattered our planet's young crust into space, where gravity glued those particles into w

https://en.wikipedia.org/wiki/Theia_(planet)
Theia ( / ˈθiːə /) is a hypothesized ancient planet in the early Solar System which, according to the giant-impact hypothesis, collided with the early Earth around 4.5 billion years ago, with some of the resulting ejected debris coalescing to form the Moon. [1] [2] Collision simulations support the idea that the large low-shear-velocity

https://www.cnn.com/2023/11/03/world/earth-moon-theia-collision-llvps-scn/index.html
Theia, an ancient planet, collided with Earth to form the moon, scientists believe. A new study suggests Theia could have also formed mysterious blobs called large low-velocity provinces, or LLVPs.

https://newsroom.ucla.edu/releases/moon-was-produced-by-a-head-on-collision-between-earth-and-a-forming-planet
The moon was formed by a violent, head-on collision between the early Earth and a "planetary embryo" called Theia approximately 100 million years after the Earth formed, UCLA geochemists and colleagues report. Scientists had already known about this high-speed crash, which occurred almost 4.5 billion years ago, but many thought the Earth

https://www.popsci.com/more-evidence-that-early-earth-collided-head-on-with-another-planet/
William K. Hartmann. Soon after the Earth coalesced in the early solar system, it was hit by another planet, Theia. The collision formed the moon, but researchers are still trying to piece

https://www.cnn.com/2019/10/23/world/exoplanet-collision-scn/index.html
More than 300 light-years from Earth, there's a double star system where evidence exists that two exoplanets, or planets outside of our solar system, recently collided.

https://www.scientificamerican.com/article/what-would-be-the-environ/
"The effects of an impact on the earth depends critically on the size, and hence the energy, of the impact. For example, a comet less than 100 meters across will explode high in the atmosphere and

https://www.thenakedscientists.com/articles/questions/how-do-we-know-another-planet-collided-earth
The best suggestion that scientists can come up with, based on all the evidence we have, is that during the early phases of the formation of the solar system (something like 4.5 billion years ago) there were two planets. One a future Earth, one another planet which they've notionally called Thea. These were very similar in terms of their

https://www.sciencealert.com/earth-is-made-up-of-two-planets-fused-together-by-a-head-on-collision-new-research-suggests
Space 02 February 2016. By Fiona MacDonald. (UCLA) Astronomers investigating how the Moon formed have found evidence that it was produced after a small planet smashed headfirst into Earth around 4.5 billion years ago. And research suggests that this collision was so violent that the 'planetary embryo' that hit us, called Theia, ended up fusing

https://www.inverse.com/science/alien-earths-book-kaltenegger-exoplanets-life-cosmos-space
In her recent book, Alien Earths: The New Science of Planet Hunting in the Cosmos, Lisa Kaltenegger discusses exoplanets, aliens, and how science mixes caution with optimism.

https://science.howstuffworks.com/nature/natural-disasters/asteroid-hits-earth.htm
There are obvious craters on Earth (and the moon) that prove a long history of massive objects hitting the planet. The most famous asteroid ever is the one that hit Earth 66 million years ago. The mountain-size asteroid left a crater off the coast of Mexico's Yucatán Peninsula 93 miles (146 kilometers) wide and 12 miles (19 kilometers) deep.

https://science-atlas.com/faq/what-if-a-planet-collided-with-earth/
Here's a timeline. The collision would cause friction between the two planets. This would slow down their rotation, if not stop it altogether. Millions of tons of superheated rock would be sending a wall of fire in all directions. The shockwave across the Earth would engulf the planet in under 20 minutes.

https://phys.org/news/2023-11-huge-blobs-earth-planet.html
This epic collision between early Earth and the proto-planet called Theia shot an enormous amount of debris into orbit, which formed what would become the moon. Or so the theory goes.

https://en.wikipedia.org/wiki/Giant-impact_hypothesis
Artist's depiction of a collision between two planetary bodies. Such an impact between Earth and a Mars-sized object likely formed the Moon.. The giant-impact hypothesis, sometimes called the Theia Impact, is an astrogeology hypothesis for the formation of the Moon first proposed in 1946 by Canadian geologist Reginald Daly.The hypothesis suggests that the Early Earth collided with a Mars-sized

https://www.nationalgeographic.com/premium/article/moon-forming-collision-theia-left-chunks-deep-within-earth-mantle
SCIENCE. 4.5 billion years ago, another planet crashed into Earth. We may have found its leftovers. A Mars-size object called Theia smashed into Earth, and the debris coalesced into the moon. Now

https://www.space.com/nasa-models-hypothetical-asteroid-impact-scenario
The average time between impacts by objects with diameters of around 1,000 feet (300 m) is around 70,000 years, while asteroids with diameters of around 2,000 feet (600 m) are predicted to hit the

https://bigthink.com/starts-with-a-bang/largest-comet-earth/
Out there, in the far recesses of the Solar System, a great existential threat lies in wait for planet Earth: the Oort cloud. Formed at the outset of the Solar System, it largely consists of the

https://www.popularmechanics.com/space/a19143/earth-moon-theia-collision/
A new analysis of lunar rock and soil samples suggests that the Earth got full-on clobbered by an ancient planet called Theia. By John Wenz Published: Jan 28, 2016 Save Article

https://www.newsweek.com/rogue-free-floating-planet-collide-earth-1794480
Even if a rogue planet came close to the Earth, the interaction may not even destroy the planet if there wasn't a direct hit. "It would need to come close enough to Earth to either collide with it

https://www.space.com/primordial-black-hole-earth-collision-probability
The smaller they are, the faster they lose mass. Black holes less than roughly 100 million tons — slightly lighter than a typical asteroid — will lose about half their mass within the current

https://www.snopes.com/fact-check/nasa-predicted-asteroid-collision-with-earth/
A NASA study predicted the future probability that a large asteroid named "Bennu" could collide with Earth. A 2021 NASA study did indeed determine the probability of Bennu, a large asteroid

https://astronomy.stackexchange.com/questions/36027/what-would-happen-to-the-earth-if-the-orbit-of-another-planet-in-the-solar-syste
If you look at the mass-sorted list of (known) solar bodies, and then at the list of further minor bodies, you get an idea of the impact a small body can make on todays planets in terms of their orbits: not much.Sure, one can hardly know whether there's Mars-sized bodies far out in the Kuiper belt or even Oort cloud. This was different in the early solar system where big(ger) bodies and

https://science.howstuffworks.com/science-vs-myth/what-if/what-if-earth-changed-its-orbit.htm
If Earth were to change its orbit - maybe because the sun somehow disappeared or another, larger object entered the solar system and exerted a stronger pull - it would very likely mean the end of life as we know it. Without any orbit, Earth would likely go crashing directly into the sun. That's because our planet's path around that big

https://www.livescience.com/planet-earth
From its iron core to the peaks of Mount Everest, discover our planet's secrets with the latest Earth news, articles and features from Live Science

https://www.astronomy.com/wp/https:/what-would-happen-to-earth-if-a-large-asteroid-hit-the-moon/
During that 4-billion-year-old epoch, the Moon was about three times closer to Earth and three times larger in the sky. Each basin-size impact engulfed the Moon with rocky debris and a fiery plume

https://www.usatoday.com/story/news/nation/2024/05/28/nasa-exoplanet-discovery/73882055007/
NASA announced the discovery of a planet 40 light years from Earth that orbits every 12.8 days and is possibly even habitable. Gliese 12 b is a "super Earth exoplanet" that is nearly the same size

https://science.howstuffworks.com/earth.htm
Axial tilt is another trait Earth shares with its cosmic brethren. By now, it's common knowledge that (a) Earth rotates on an axis relative to the sun every 24 hours and (b) Earth orbits the sun once every 365.25 days. As Earth spins on its axis, parts of the planet are in the sun while others are in the shade.

https://www.smithsonianmag.com/smart-news/mars-was-hit-with-a-solar-storm-days-after-earths-aurora-light-show-nasa-says-180984548/
Days after solar storms spurred widespread sightings of auroras across Earth in early May, a new bout of eruptions on the sun brought glowing skies to another planet: Mars. From pole to pole, Mars

https://earthsky.org/space/threat-of-supernovas-to-life-on-earth/
Gamma rays aimed at Earth. If the Earth were in the line of fire of a gamma-ray burst within 10,000 light years, or 10% of the diameter of the galaxy, the burst would severely damage the ozone