Word: planetsized
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The puzzle Both these old stars show signs of youth. BP Piscium ejects jets of gas into space, which can create planetesimals that merge and form planets.
The hypothesis Astronomers speculate, though, that both stars could have engulfed nearby stars and might then use the assimilated material to make new planets.
Two stars thought to be at least hundreds of millions of years old could soon generate new planets?a phenomenon astronomers have never seen. Scientists say BP Piscium in the PISCES constellation and TYCHO 4144 329 2 in URSA MAJOR display conditions that suggest they could form new planets. A...
The discovery Both stars probably created planets far in the past. Planet formation was thought to occur only when stars are young and enshrouded in dusty and gaseous disks.
Why it's unlikely The gases necessary to form planets are used up after just a few million years and are not replenished during a star's lifetime. Our solar system, for example, is all out.