In his first observations from Mount Wilson, Hubble used a telescope with a mirror one hundred fifty-two centimeters across.

VOA: special.2009.04.29

That year, an observatory official,V.M.Slipher, offered a young man a job working with the new telescope.

VOA: special.2010.07.11

Soon after, Hubble began working with a larger and more powerful telescope at Mount Wilson.

VOA: special.2009.04.29