Astronomers have understood since the 1950s that the galaxy is curved, but until now, they’ve based that idea on models and indirect measurements.
Over a six-year period, the researchers took more than 100 images of the galaxy from their observatory in the Chilean Andes. In particular, they monitored 2,400 stars called classical Cepheids, a category of “young” supergiants less than 400 million years old.
Warped shape of the galaxy
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How Spending Changed for Different Income Groups
I compared spending in 1996 against the most recent spending estimates from the Bureau of Labor Statistics.
How Much Minimum Wage Changed in Each State
Minimum wage has increased over the years, but by how much depends on where you live.