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    How to Weigh Stars with Gravitational Lensing

    July 22, 2018, Categories  Astronomy/Space

    Image from the PAN-STARRS Telescope at Hawaii from early 2011 with the foreground star Ross 322 (blue square) and the background star (at the centre of the green circle) which will be traversed by Ross 322 in the next few weeks. By summer 2015, Ross 322 had moved to the position of the blue triangle (measured by Gaia). Since then, it has been moving along the blue-red line and is currently close to the position of the background star.

    Image from the PAN-STARRS Telescope at Hawaii from early 2011 with the foreground star Ross 322 (blue square) and the background star (at the centre of the green circle) which will be traversed by Ross 322 in the next few weeks. By summer 2015, Ross 322 had moved to the position of the blue triangle (measured by Gaia). Since then, it has been moving along the blue-red line and is currently close to the position of the background star.

    Astronomers have published the predictions of the passages of foreground stars in front of background stars. A team of astronomers, using ultra-precise measurements from the Gaia satellite, have accurately forecast two passages in the next months...

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