High-mass stars are not formed from dust disk.
It is well known how small, young stars are created. They accrete matter from a
disk of gas and dust in a relatively orderly fashion. Astronomers have already
seen many of these disks of dust around young, low-mass stars but never
around young, high-mass stars. This raised the question of whether large stars
come into existence in the same way as small ones.
The observation showed strands of gas coming at the young, high-mass stars
from all directions. In addition, the researchers saw jets which indicate that there
may be small disks, invisible to the telescope. Also, it would appear that some
hundred years ago the disk around one of three stars studied rotated. In short:
The researchers concluded that these young, high-mass stars, in their early
years at least, are formed by matter coming from multiple directions and at an
irregular speed. This is different for small stars, where there is a stable influx of
matter. The astronomers suspect that that multiple supply of matter is probably
the reason that no large, stable disks can be created.
May 17 – Mercury at Greatest Eastern Elongation. The planet Mercury reaches
greatest eastern elongation of 22 degrees from the Sun. This is the best time to view
Mercury since it will be at its highest point above the horizon in the evening sky. Look
for the planet low in the western sky just after sunset.