Astronomers have taken the most accurate measurement of the Milky Way to date, finding it is heavier than previously estimated.
A team of international scientists used NASA's Hubble Space Telescope and the European Space Agency's Gaia satellite to determine our galaxy weighs about 1.5 trillion solar masses or 1.5 trillion times the weight of the Earth's Sun.
Astronomers also found the majority of the galaxy's mass comes predominantly from dark matter, not the 200 billion stars.