PRACTICAL EXERCISE 1: The Hubble–Lemaître law

The graph below is often used by the astronomers who study the Universe and specialize in cosmology. Can you tell what it illustrates? Use the guiding questions from the table under the graph and fill in your answers in the empty boxes in the second column.


GUIDING QUESTIONS 

ANSWERS 

What is shown
on the horizontal axis?

What are the units used?

How (using what methods)
can the scientists measure this
parameter?nbsp;

What is shown on the vertical
axis?

How (using what methods) can
the scientists measure this
parameter?nbsp;

Which of the two parameters is
harder to measure?nbsp;

What are the dimensions of the
parameter, represented by the
slope of the graph?nbsp;

What is the parameter,
represented by the slope of the
graph?nbsp;

What would be the dimensions
of the parameter that is the
inverse of the slope of the
graph?

Can we use it to study the
Universe? If yes - how, if no -
why?nbsp;