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Fossil records suggest that starfish came about in the Cambrian period. This was about 500 to 570 million years ago. This is part of the Cambrian burst, a period of time when there was sudden explosion complex lifeforms on the planet.

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Why does the sun appear to be the brightest and biggest star on earth?

sun is the closest star to earth .


Towards which star does the earth's axis appear to be tilted?

The north star


Why does the sun appear to be the brightest star to us on earth?

It is the closet star to us.


Is a star brighter if it is closer to earth?

Yes, a star appears brighter if it is closer to Earth because the brightness of a star we see is affected by its distance. The closer a star is, the greater the amount of light that reaches Earth, making it appear brighter in the sky.


What way does a star a appear in night sky?

A star can only appear to an observer on the dark side of the Earth, facing away from the Sun, so that the star's light can be seen.


Why do constellations appear to revolve around the Pole star?

This is because the Pole Star (i.e. Polaris, in the Northern hemisphere) is within a degree of the Earth's centre of rotation. That is, the north pole is in line with this particular star. Thus, as the Earth rotates, Polaris does not appear to move in the sky, and the rest of the stars appear to revolve around it.


Is it true that the closer a star is to earth the brighter it appear?

That is one factor. The size of the star is the other.


Why does the sun appear to be the brightest star you see?

because it is the closest to the earth


A bright star can appear dimmer than a less bright star if the bright star is?

If the bright star is located farther away from Earth than the less bright star, it will appear dimmer due to the inverse square law of light intensity. The amount of light reaching Earth decreases with distance, so a closer, less bright star can appear brighter than a further, brighter star.


How bright does a star appear from earth?

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Which is true The more a star appears to move the farther it is from earth The less a star appears to move the farther it is from earth Stars that do not appear to move are very close to earth?

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What year did Star Trek first appear on tv?

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