UA Science

Eta Car image courtesy of Nathan Smith.

Steward Astronomers Use Trick of Light Echoes to Unravel 19th Century Mystery of a Behemoth Star

Eta Carinae is the most massive and most luminous star known in the Milky Way galaxy.  It is famous for its "Great Eruption" that occurred in the mid-19th century, when it brightened for about 20 years to become the second brightest star in the sky, and it is surrounded by a massive dumbbell-shaped nebula that is recognizable from Hubble images.  The cause of its giant outburst has remained mysterious since then, although it is the prototype for an entire class of modern transients seen in other galaxies, including some outbursts that immediately precede supernova...

Steward's Imaging Technology Laboratory Delivers More Than 100 CCDs For The LSST Telescope

The University of Arizona has completed delivery of over 100 science-grade 4kx4k Charge-Coupled Device (CCD) image sensors for the Large Synoptic Survey Telescope (LSST). This work was performed at the UA Imaging Technology Laboratory (ITL). The sensors are among the most...

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