With just a nudge, Betelgeuse can commit the comet to come.Something I've never actually seen or heard considered when it comes to cataclysmic earth impacts, is Betelgeuse and its eventual supernova.
Not directly impacting the earth, of course. It’s energy burst wont even compare to daily bombardment of the sun’s solar winds, that are being blocked by our magnetic field. We see this every night near either polar region as an aurora.
But, consider the last supernova visible to earth. What is commonly known as the crab nebula, is a kind of nebula called a supernova remnant. So, a thousand years ago it was a common star going supernova. Seen and recorded, the light of the crab stars supernova was seen as a bright star visible by daylight and having lasted for several days. The crab nebula is 650ly (light years) from earth.
Betelgeuse is a red supergiant.. over ten times closer to earth than the crab nebula, It is 64ly away. And hundreds of thousands of times larger than our sun.
The problem for earth won’t be caused by a direct effect of the blast. But, the sustained energy shockwave caused by Betelgeuse would be just enough to give a significant nudge to a small portion of the objects our Oort cloud.
At one light year away, totally uninfluenced by the solar winds of our sun, our Oort cloud is comprised nickel/iron and water ice, Estimated at million km wide objects at a distance that forms a bubble. Most of its density follows the same elliptical path our planets. A few of these objects have already been set into motion and travel through the solar system. We know as comets. Most are drifting in and out of our inner solar system like clockwork predictable orbits on harmless paths. Yet, some Oort cloud objects, appear randomly with no known cause, and on planetary collision courses. Shoemaker Levi 9, was such an object. In the 90s it created an impact on Jupiter so great, that one of the nine comets impact created a fireball large enough to engulf to totally the earth. Nasa recorded and made live video of this event.
The Betelgeuse supernova energy blastwave will be by comparison to the crab nebula event, seen in the northern hemisphere as a second smaller sun that will continue to glow for 40+ hours. It will be the brighter than every star in our galaxy for more than a day. From such a blast of energy, even at 64 light years away it will cause a slight disruption to objects between it the Oort cloud and our sun. Just a slight nudge inbound, to a fraction of the sky, by the sustained blast, to objects beyond our suns influence will cause them to drift, starting with just a few kph inbound, the sun’s gravity and time will build the momentum to do the rest. This is how all comets begin, with a small disruption, gravity and a lot of time.
After the Betelgeuse supernova some 60-80 years later, the solar system is going to be under fire … maybe some will read the warnings and be prepared to and practical enough to live in space.
When a sun produces iron, it's the end. Iron being a black metal the color absorbs the infrared radiation. That's why you see dark red expanding and contracting. Iron can only take so much. Betelgeuse is coming sooner than later.