Light from Earendel has traveled for 12.9 billion years to reach us.
, they nicknamed the star Earendel, from the Old English for “morning star” or “rising light.” The light from Earendel has traveled for 12.9 billion years to reach us, starting its journey only 900 million years after the Big Bang. The star is in a patch of sky that looks empty to the naked eye.
I’ll do my best. Einstein’s theory of general relativity tells us that mass bends the space around it. Think of a bowling ball on a trampoline, it just bends the space around it. And as light moves through this bent space, it curves around this really massive object.That does a couple things for us. It magnifies the background objects. It also ends up distorting them. Gravitational lenses aren’t smooth, they’re not perfectly shaped like the lenses in your glasses to focus the light.
Pretty much, yeah. Based on the color of the object, we can tell how far away it is. So with the positions and then the distance, it can tell us how much the light is actually bending. And then that can in turn constrain things like the mass [of the object] and the magnification.The light that you’re seeing from it has taken a really, really, really long time to reach us.
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