first a new planet now THIS?
You read the headline correctly and it surprised us too. Apparently this has been quite a week for astronomy. First two scientists from Caltech darn near proved that there is another unseen planet at the edge of the solar system. Now, a different group says they’ve spotted some unusual objects in our galaxy:
Astronomers think they may have found giant “invisible” structures lurking in the Milky Way. These things seem to be pretty big – roughly the size of Earth’s orbit around the Sun – and they could help to explain where a bunch of missing matter in the universe is, known as the missing baryon problem.
Let’s find out more about what these objects could be on page 2