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What is the importance of variable stars in determining the size and shape of your Galaxy?
Wiki User
∙ 13y ago
It's difficult to know exactly how far away a star is. We can't go there and measure it, for example. And different sized stars all have different brightnesses, so we can't always go by the brightness, either. Some bright stars are close; some bright stars are just bright, but far away.
There's a special class of stars called "Cephid Variables" whose brightness slowly changes. And we know (or at least, we THINK we know) that we can use the periodicity of the change to calculate the mass of the star - and if we know the mass, we know how bright the star really is. And if we know what its actual brightness is, we can measure the observed brightness, and figure out how far away the star must be.
Wiki User
∙ 13y ago
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What Describes a galaxy that has no discernable shape or structure?
irregular galaxy.Irregular galaxies are galaxies that have no discernable shape or structure.
What is a sentence for irregular galaxy?
An irregular galaxy is a galaxy with no definite shape like spirals, lenticulars, and ellipticals.
How is a irregular galaxy different from a elliptical galaxy?
The difference is in the shape, as can be guessed by the name.
The shape of the isolation zone?
variable
What is a galaxy that doesn't have a regular shape called?
They are called 'irregular galaxies"
What is the primary factor in determining the classification for an elliptical galaxy?
shape
What is a Galaxy called that has a shape?
It depends what shape the galaxy has.
What characteristic of radio waves makes them useful for determining the shape of a galaxy?
Radio waves can penetrate interstellar gas and dust without being scattered or absorbed
What characteristics of radio waves makes them useful for determining the shape of a galaxy?
Radio waves can penetrate interstellar gas and dust without being scattered or absorbed
What is the shape of the galaxy you live on?
The shape of the Milky Way (our galaxy) is the shape of a spiral.
What galaxy has no regular shape?
irregular galaxy
Is amoeba a variable shape cell?
yes amoeba is a variable shape cell
What shape does an spiral galaxy have?
First of all, it's a spiral galaxy, not an spiral galaxy. Second, a spiral galaxy would have a spiral shape, obviously.
What galaxy is an irregular galaxy?
An Irregular Galaxy is a galaxy that has no shape or form as defined by the classes of the "Hubble sequence" An Amorphous galaxy is a galaxy that has neither spiral nor elliptical in shape as defined by "The Atlas of Peculiar Galaxies". See related links for pictorial representation
What galaxy has a chacteristic of an pinwheel shape?
A spiral galaxy has the shape of a pinwheel. Our solar system is in a spiral galaxy that we call the Milky Way.
What is the type of our galaxy?
Our galaxy is a spiral galaxy because it is spiral in shape.
A galaxy that has a shape similar to a football is a?
Elliptical Galaxy!
