Tomorrow will be a big day: Rosetta will try to land on comet

Rosetta is a robotic space prbe built and launched by European Space Agency to perform a detailed study of comet67P/Churyumov-Gerasimenko with both an orbiter and lander module

Tomorrow will be a big day: Rosetta will try to land on comet

Read the following link about Rosetta and then ask the questions: 

http://www.independent.co.uk/news/science/rosetta-spacecraft-to-land-probe-on-comet--and-make-scientific-history-9849302.html

Language work

1. Explain the meaning of the following words or phrases which appear in the article

 is no stranger

 overseen

 yet (according the context)

 ejected

 slingshot

 touchdown

 hazard-free

 boulders

 cushion its impact

crust

2. What do these words/phrases refer to?

one speeding bullet

 60.000 km/ h

 unusual

2004

 the gravity of Earth and Mars

Agilika

Depressions

 Washing machine

 Water

 Ptolemy instrument

3. Which problems are mentioned that might complicate the manoeuvre?

In the following link, if you want you will find the answers:

https://docs.google.com/document/d/1pjlswBukHse8vj1J7_-hxutvz6hMYWOv5bs332feYGs/edit