A Caltech Library Service

What Is a Planet?

McCaughrean, Mark and Reid, Neill and Tinney, Chris and Kirkpatrick, Davy and Hillenbrand, Lynne and Burgasser, Adam and Gizis, John and Hawley, Suzanne (2001) What Is a Planet? Science, 291 (5508). pp. 1487-1488. ISSN 0036-8075.

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item:


Cool objects found in young star clusters in Orion and Perseus, such as those reported by M. R. Zapatero Osorio and colleagues in their research article (6 Oct., p. 103), have been described variously as “planetary mass objects,” “isolated giant planets,” “free-floating planets,” and “superplanets” (1). The word “planet” has been invoked because the masses of these objects are apparently only about 5 to 10 times that of Jupiter. However, even if those masses are confirmed, we maintain that such bodies are better thought of as low-mass brown dwarfs, as they are not in orbit around stars.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Tinney, Chris0000-0002-7595-0970
Kirkpatrick, Davy0000-0003-4269-260X
Burgasser, Adam0000-0002-6523-9536
Gizis, John0000-0002-8916-1972
Hawley, Suzanne0000-0002-6629-4182
Additional Information:© 2001 American Association for the Advancement of Science.
Issue or Number:5508
Record Number:CaltechAUTHORS:20141118-101755520
Persistent URL:
Official Citation:What Is a Planet? Mark McCaughrean, Neill Reid, Chris Tinney, Davy Kirkpatrick, Lynne Hillenbrand, Adam Burgasser, John Gizis, and Suzanne Hawley Response from Maria Rosa Zapatero Osorio Science 23 February 2001: 291 (5508), 1487-1488. [DOI:10.1126/science.291.5508.1487b]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51895
Deposited By: Ruth Sustaita
Deposited On:18 Nov 2014 19:28
Last Modified:09 Mar 2020 13:19

Repository Staff Only: item control page