Tags » Brown Dwarfs

Astronomy on Tap

One of the great things I’ve been able to do in New York City is take part in Astronomy on Tap, a public lecture/happy hour series organized by Emily Rice (CUNY-CSI), Summer Ash (Columbia), Brian Levine (AMNH), and their less-mild-mannered alter egos. 168 more words


VLT/SPHERE non-detection of the proposed brown dwarf in the V471 Tauri system

Image and text credit: European Southern Observatory (ESO) science release. A tertiary brown dwarf companion in the V471 Tauri eclipsing binary system has been… 730 more words


Real-life sci-fi world #4: Earth around a brown dwarf

Welcome to Real-life Sci-fi worlds.  We are using science to explore life-bearing worlds that are the settings for science fiction stories.  Up today: an Earth-like planet orbiting a brown dwarf. 2,093 more words

Conditions For Habitable Planets

on the Sizes of Stars

Stars are easy to understand.  The definition of a star is pretty clear: Stars are self-gravitating masses of gas* that sustain nuclear fusion in their cores.  689 more words


Introducing John Gizis

This week features John Gizis. He is a professor in the Department of Physics and Astronomy at the University of Delaware in the USA. Instead of studying extremely distant luminous objects  with our most moderrn telescopes, he studies dim, nearby stars— think M, L, T and Y dwarfs. 116 more words


A determination of the low mass end of the main sequence and the hydrogen burning limit

Image credit: P. Marenfeld & NOAO/AURA/NSF. The ordinate is the stellar radius.

In research accepted for publication in the Astronomical Journal, the RECONS (

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Press release: Planet-like object may have spent its youth as hot as a star

WISE J030449.03-270508.3 belongs to a class of cold, extremely low mass objects, known as Y dwarfs. Only about twenty of those are known, and this one shows a peculiar spectrum suggesting that it may be metal-poor and/or older than previously identified Y0 dwarfs. 55 more words