Light years, parsecs, and kiloparsecs. Light years and parsecs are used to measure distances between neighbouring star system's, kiloparsecs are used to measure distances within a galaxy.
use a piggy bank and measure the distance from the piggy bank and a star
No, they are much too far away, and you would have a number too large to be usable.
A light year is a measure of how far light can travel in one year. It is a phenomenal distance, and is used to describe how far away stars are from us.
Distance is a measure of length, grams is a measure of weight.
You can use trigonometry to measure the height of an object that is too far away to directly measure the distance to. By measuring the angle of elevation from your position to the top of the object and knowing your distance from the object, you can use trigonometric functions to calculate the height.
Magnitude is brightness. As stars are further away they're dimmer. It may seem like a star that twice as far away would be half as bright but it doesn't work that way. Brightness falls off in proportion to the square of the distance away. A star that is twice as far away is one-fourth as bright.
No, if you can measure no parallax, the star is far away - further than a certain distance.
stars are pretty far away from the solar system
We can't use parallax to measure a stars distance from the Earth if the star is already too far away. The angles used in parallax measurment are already very small, and if the star is beyond a certain distance from us the angle becomes too small to measure, and no distance can be determined.To date the largest distance that can be measured using parallax, with the Hipparchos sattelite, is about 1 600 light years. This will be improved with the European Space Agencies Gaia mission in 2012 and 2013.
If a star's parallax is too small to measure, it means that the star is far from Earth. Parallax measurements are used to determine the distance of nearby stars by observing their apparent shift in position as Earth orbits the Sun. Stars with large parallaxes are closer to Earth, while stars with small or undetectable parallaxes are further away.
it is so far that kilometers wont work
Because they are so far away. Same principle applies to any object as it recedes into the distance.