- A Hipparcos Census of the Nearby OB Associations (iopscience.iop.org)
A comprehensive census of the stellar content of the OB associations within 1 kpc from the Sun is presented, based on Hipparcos positions, proper motions, and parallaxes. It is a key part of a long-term project to study the formation, structure, and evolution of nearby young stellar groups and related star-forming regions. OB associations are unbound “moving groups,” which can be detected kinematically because of their small internal velocity dispersion. The nearby associations have a large extent on the sky, which traditionally has limited astrometric membership determination to bright stars (V ≲ 6 mag), with spectral types earlier than ∼B5. The Hipparcos measurements allow a major improvement in this situation.
- Sand Point, Seattle (Wikipedia)
Sand Point is a neighborhood in Seattle, Washington, United States, named after and consisting mostly of the Sand Point peninsula that juts into Lake Washington, which is itself largely given over to Magnuson Park. Its southern boundary can be said to be N.E. 65th Street, beyond which are Windermere and Hawthorne Hills; its northern boundary, N.E. 95th Street, beyond which is Lake City. The western limit of the neighborhood, beyond which are View Ridge and Wedgwood, is not fixed and can be said to be anywhere up the hill that extends west from Sand Point Way N.E. as far as 35th Avenue N.E. It is also the former home of Seattle Naval Air Station.