the study of stars and other bodies in space.
When I was a child, I wanted to study astronomy and become an astronaut so I could travel into outer space.

having the necessary qualities or enough skill to do something well
Lilly was a competent pianist with many years of experience.

to cut off someone's head
A guillotine uses a blade to decapitate someone.

a way of behaving that shows a person is calm and has control of his or her actions in difficult times
My father is a man of great dignity because he always manages to stay calm.

to kill someone, usually as a punishment
They planned to execute the prisoner this morning, but they were told to bring him back to court.

a person who will receive power or money
Sir George is the next heir to the king's throne.

a plan or a purpose for doing something
What is the intent of the author when he wrote this?

in a manner that measures or compares something to something else
Students from wealthier families do relatively better than students from low income families.

an often violent replacement of a ruler or a government
The French revolution replaced the king with a democratic government.

a disastrous event that makes people sad and usually involves death
The recent train crash that took the lives of several people was a tragedy.