Assignment4 Milky Way Galaxy

____________ dwarf galaxies are currently in close encounters with our Galaxy and in sections of their orbits situated well within the volume occupied by our Milky Way

two

As a galaxy, the Milky Way is actually a giant, as its mass is probably between 750 billion and one trillion solar masses, and its diameter is about __________________ light years.

100,000

Our Solar System is located about ______________light years from the center of the Milky Way Galaxy.

28,000

In order to obtain a picture of the whole Milky Way as it appears from Earth, one must either compose a mosaic of many photographs (optionally computer-processed), or create a drawing.

True

In the infrared light, the structure of the Milky Way can be better investigated, as the obscuring dust clouds are of better transparency for long wavelength IR than for the visible light.

True

Radio astronomical investigations of the distribution of hydrogen clouds have revealed that the Milky Way is a spiral galaxy.

True

The Milky Way Galaxy belongs to the Local Group, a smaller group of 3 large and over 30 small galaxies.

True

The Solar System is situated within a smaller spiral arm, called the Local or Orion Arm.

True

The central region of the Milky Way, as those of many other galaxies, is more densely crowded with stars than the outer region, and contains a massive central object, Sagittarius A*.

True

The Milky Way is the galaxy which is the home of our Solar System together with at least 200 ________________ other stars

billion