Let’s try a demonstration that we all enjoyed in elementary school. Close one eye, hold out your thumb at arm’s length, and align it with an object on the other side of the room. Without moving your ...

Publications of the Astronomical Society of the Pacific, Vol. 133, No. 1029 (2021 November), pp. 1-9 (9 pages) Space-based observatories at the second Sun—Earth Lagrange Point (L2) offer a unique ...

Don't miss the big stories. Like us on Facebook. Astronomers quickly become used to dealing with huge numbers. For example, in any one lecture, I might declare that the sun emits some 400 billion ...

Countless stars in the Milky Way are being raised and lowered by a gigantic wave. This was discovered using data from the ...

Using data from ESA's revolutionary Gaia space telescope, a research group has created a three-dimensional map of the areas around our sun where stars are born. This should help with the particularly ...