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How to Set Up a PayPal Account PayPal is a popular online payment system that lets you shop online without having to re-enter your information for every transaction. You can easily set up a PayPal account and start using it in a matter of minutes. Part One of Two: Creating an Account 1 Visit the PayPal website or open the PayPal app.  You can create an account from the PayPal homepage or from the app. You can install the app for free from your device's app store. The account creation process is largely the same for both the website and the app 2 Click "Sign Up for Free" or tap "Sign Up". This will begin the account creation process. For business accounts, there are two different options, each of which have different cost structures and benefits. Standard accounts free, but customers must route through PayPal in order to check out. Pro accounts cost $30 per month, but you get to full control over how you want to design the che...

A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole. Scientists can study stars to find out if they are flying around, or orbiting, a black hole. When a black hole and a star are close together, high-energy light is made. This kind of light can not be seen with human eyes. Scientists use satellites and telescopes in space to see the high-energy light. How Big Are Black Holes? Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or "stuff," in an object. Another kind of black hole is called "stellar." Its mass can be up to 20 times more than the mass of the sun. There may be many, many stellar mass black holes in Earth's galaxy. Earth's galaxy is c...