If you just want to see NASA and Angel One, then you'd need some RG6 cable with connectors, and any FTA receiver.
Of course if you ever want to grow in the hobby and get more interesting things, then you'd like to get a
decent receiver...

Reason I phrase it that way, is because there is some junk on the market.
(more later)
Now, as to what you might grow into, here is a
very simplified list of FTA satellites and you can get an idea of what is on them.
When you get to where you want better info, we also have TheList hosted here on SatGuys.
To get those stations, you'll need to be able to see their satellites, and for that, TheList has a calculator.
You put in your zip code and it will tell you where in the sky to aim for a given bird (how high and which direction).
You'll need a 30 - 36 inch dish (and it's better to err on the large side), along with a linear LNB.
There are good deals to be found on 36" dishes (
example), and many LNBs go for $15..25.
The LNBs come in two types: Standard or
Universal.
For getting started, either would be fine.
The LNBs on the Dish 500, are circular, and are specific to their purpose.
When our sponsors have excellent deals, we like to let folks know.
Two particularly desirable receivers are the
Fortec Mercury II and the
Visionsat IV-200.
And I don't just say that because I have both; I have both because it's true!
Look over the things I've linked above, and hopefully you'll be getting a feel for the hobby.
Oh, and welcome aboard ! - :up