They are objects that are confined to the arms of a galaxy, i.e. objects that only exist within the spiral arms, and are not found (except very rarely) outside of spiral arms. Examples of tracers are structures to do with star formation, like for example open star clusters, giant molecular clouds or supernova remnants.
Spiral arms are 'density waves' of stars that rotate around the galaxy. The stars themselves mostly don't travel at the same speed as the spirals, what we are observing is a wave phenomena not that different from at a football game.
The galaxy is made up of billions of stars.
Some are gathered in the center bulge. The rest make up the disk of the galaxy which is about 200,000 lys in diameter.
Picture Saturn as the bulge and Saturn's rings as the disk of our galaxy (But BIGGER!)
1). the sun
2). the moon
3). the earth
The milky way galaxy has 3 components.The disk containing the spiral arm,the halo,and the nucleus or central bulge
The PartsOf galaxy Is Natural Gases Nd parts OfChemical stars
Basically the same as the rest of the galaxy: stars, dust, gas, etc.
Im pretty sure its your galaxy too.
spiral arms
Our galaxy, the Milky Way, is a spiral galaxy (actually a bared spiral) and new stars are being born in the spiral arms.
A spiral galaxy or barred galaxy, the milky way is one.
Such a galaxy is called a spiral galaxy.
yes, the milky way it is a barred spiral galaxy
we are located within one of its spiral arms.
A spiral galaxy or barred spiral.
An ordinary spiral galaxy has spiral arms coming out of the core. In a barred galaxy, the central area consists of a bar of stars and the spiral arms are attached to the ends of the bar.
It has no spiral arms.
The spiral arms
a spiral galaxy
Our galaxy, the Milky Way, is a spiral galaxy (actually a bared spiral) and new stars are being born in the spiral arms.
Yes, a SBC galaxy is a type of a spiral galaxy. The have loosely bounded arms.
The arms of the Spiral Galaxy are mostly located in one plane.
A grand design spiral galaxy (like Whirlpool Galaxy) has prominent and well defined spiral arms, whereas a flocculent galaxy (like Sunflower Galaxy) has short segments of spiral structure, "fluffy" in appearance, but without the dramatic well defined spiral arms of a grand design spiral.
A spiral galaxy.
arms
A spiral galaxy or barred galaxy, the milky way is one.