The oxygen levels also varied in step with water levels as Rosetta
flew around the comet, suggesting that ice and oxygen in 67P's atmosphere are coming from the same places in its nucleus.
Not exact matches
Astronomers have seen massive stars fall toward some central object and whip
around it, like a
comet around the sun, and
fly back out.
Everything
flying around space is pretty weird, but this one is extra weird, which is why astronomers are so excited about it — in fact, although scientists first dubbed it a
comet, they're now not even sure what it is.
On November 4, 2010, NASA's EPOXI mission
flew at a close distance of
around 435 miles (or 700 kilometers) by
Comet Hartley 2, which was then an active short - period
comet with jets of gas and dust coming off its sun - lit end and which completes an orbit in less than 6.5 years.
If
comets and other bodies, accelerated both on their approach to the Sun and as they moved away from it, they would have gotten faster and faster until the solar system
flew apart, and we would not now be
around to discuss it.