"Wow, America is amazing!
It was my first flight on Saturday and it was breath-taking - being between the clouds.
I flew from Birmingham to Newark (in New York) and that took seven hours, then we flew from Newark to Houston, that took four hours.
As I walked out of the airport, I was met by the immense heat and humidity of Houston - my glasses actually steamed-up!
The next morning I was picked up by Scott Kelly, who I am now staying with (he's an American astronaut), and taken to the home he shares with his family; Leslie, his wife, Samantha (Sammi) his nine-year-old daughter, and Charlotte, his 10-month-old daughter.
I feel so privileged to be able to stay with such a great family.
Everything here is so different, I was surprised to see what appeared to be giant upside-down leeks! It turns out that they actually hold water, and are used to increase the water pressure.
It's also so much flatter here than in Wales - not a hill in sight!
Tigers and giraffes
On the Sunday, Rebeka Venters from Scotland arrived, she is also staying with the Kelly family, she was exhausted.
On Monday we met all the other students - it was fantastic.
Everyone is so different, for example, when I was talking to some of the other students about the wildlife in their areas, I was telling them about foxes and badgers, whereas some people were talking about lions, tigers and giraffes!
On Tuesday we had interviews, so that we could be put into groups, white - living on Mars, red - getting to Mars, blue - working on Mars, and yellow - logistics.
The interviews were very casual, and were more about getting to know each other.
I have been chosen to be in the blue team, and have been given t-shirts of that colour in order for us to be able to distinguish between the groups.
Today we visited the Houston Museum of Natural Science, and Butterfly Centre - it was loads of fun, but we had to wait outside of the museum in the sun for around half an hour, not a good thing over here!
This evening we're having a pool party with Sara (from Italy) and Rachael (from Kentucky), who are staying with a family near us.
That's it for now."