In minecraft, A Nether Star is used to create a beacon, which is crafted with 3 obsidian on the bottom, a Nether Star in the middle, and glass in the rest of the slots.
A beacon is placed on top of a pyramid (which is not hollow) of any combination of blocks of Iron, Gold, Diamond, or Emerald. the height of the pyramid (the maximum height is 5 blocks) determines the effect of the beacon, which you can change by inserting an iron ingot, a gold ingot, a diamond, or an emerald.
To my knowledge, beacons are the only use for nether stars.
Notch uses social spy to know what players of Minecraft are doing and how they use Minecraft. It will, for example, show if your playing from a browser or from the client and other minute details such as this.
'Seeds' are a string of text and numbers that Minecraft uses to generate a world. So it controls all naturally-appearing terrain. Herobrine is added by a mod, there's no 'seed' for it, that's not what seeds are for.
He bought Minecraft and uses the application
Minecraft uses Java, which is slower than what other games use.
Minecraft is made to work with ANY computer that uses java.
Star topology
For colouring wool blocks.
Minecraft was created in Java and uses Java to run, therefore you MUST have Java to play Minecraft.
Chrysler uses a 5 pointed star. I know of none that uses or has used a 7 pointed star.
We generally think of Polaris as the Pole Star, but there are other uses. Click on the link below to see what they are.
Minecraft uses about 500 megabytes of RAM to play, that can vary if you change the settings.
Usually Yes, the other people just need to know _your_ IP address that you connect to the internet with. The only issue you may have is if you need to enable port 25565 that Minecraft uses.