When you buy through links on our articles, Future and its syndication partners may earn a commission.An illustration shows a red giant spitting out blobs of plasma and receiving “kicks” in the opposite direction. | Credit: Robert Lea (created with Canva)Scientists have discovered that dying stars don’t go down without a fight. New research suggests that when stars like the sun enter their red giant phase, they spit out blobs of plasma and receive a corresponding “kick” in the opposite direction.Stars become red giants when the hydrogen in their cores is exhausted, and that core collapses. This results in the outer layers of the star where nuclear fusion is still occurring, puffing out and expanding the star’s radius to as much as 100 times its original size. Those outer layers are eventually lost altogether, leaving behind a dense stellar remnant known as a white dwarf. The sun itself will undergo this transformation in around 5 billion years, swelling out to around the orbit of Mars and engulfing the inner rocky planets, including Earth.AdvertisementAdvertisementCalifornia Institute of Technology researcher Jim Fuller calculated that before a star becomes a white dwarf, it will receive around 10,000 little kicks over the course of hundreds of thousands of years. The cause of these kicks is the ejection of blobs of plasma from the red giant stars.”In this model, blobs of matter are chaotically being ejected from the surface of the bloated stars in an asymmetric fashion,” Fuller said in a statement. “And every time that happens, the star gets a little kick in the opposite direction. Like Newton said, for every action there is an equal and opposite reaction.”The blobs of plasma will be chaotically ejected in random directions, but this will still result in an overall net push on the red giant, a phenomenon mathematicians call a “random walk.” This is akin to randomly flipping a coin to decide whether to move north or south and still eventually finding yourself moved from your starting position. Fuller determined that for a red giant, this random walk would see a movement in a random direction at a speed of around 2,200 mph (3,540 km/h). This may seem like a lot, but it pales …
