a comet has tail behind it while a star is like a little dot.
you can't
Diamond is much harder than Sapphire. also the Diamond will be more sparkly.
The star you're looking for to tell direction is Polaris, the North Star. If you know what time it is, and have an accurate star map, you could use Betelgeuse to tell direction, but it's difficult.
The group of stars known as the Big Dipper (part of Ursa Major) can be used as a star clock to tell time at night. By tracking the position of the Big Dipper in the night sky, you can estimate the time based on its orientation relative to the North Star.
A comet that's bound to the sun and appears periodically is in an elliptical orbit. A comet that whizzes through the solar system only once and then leaves for good is in a hyperbolic orbit. If the comet is periodic but with an exceptionally long period ... thousands of years e.g. ... then we can't tell, from the small part of its orbit that we can see, whether it's elliptical or hyperbolic.
a star doesn't move and a comet has a tail
There is no way to tell the difference between a shooting star and a comet until AFTER you've clicked on one. If you're lucky and it was a comet you will either get food or a solar suit item (boots, helmet, belt, pants, jacket). If it's a shooting star, the words shooting star will appear on your screen and all you will have done is wasted a turn.
A comet ejects water vapors & various organic gases, asteroids are just dark clumps of space rocks/debris. You can see a comet for hours, days or even months with the naked eye in some cases whereas with asteroids they are typically only seen as they arrive, as it were.
how can you tell the difference between a tortoise and a turtle by shell in picture
Can you tell the difference between Vyvanse and Concerta in a drug test
Vending machines have laser scanners that can tell the difference between the bills.
you can tell the difference between right and wrong from the little voice inside your head
please tell me the difference between thickness
No difference
no but you can tell the difference by taste
tell me
tell me the answer