News and Views: Low-mass stars pull weight in globular clusters; Red dwarf planets are common, too; More planets than stars in the Milky Way? After Bullet comes Musket Ball; Planets survive red giant phase

Details News and Views: Low-mass stars pull weight in globular clusters; Red dwarf planets are common, too; More planets than stars in the Milky Way? After Bullet comes Musket Ball; Planets survive red giant phase News and Views: Low-mass stars pull weight in globular clusters; Red dwarf planets are common, too; More planets than stars in the Milky Way? After Bullet comes Musket Ball; Planets survive red giant phase

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012a%26g....53a...6.&link_type=abstract

Astronomy & Geophysics, Volume 53, Issue 1, pp. 1.06-1.06.

Physics

Geophysics

Scientific paper

Gravitational microlensing techniques have uncovered the first low-mass star found in a globular cluster, suggesting that previously undetectable stars may contribute to cluster masses, meaning that there is less dark matter to find.
Data from NASA's Kepler mission suggest that small rocky planets may be common orbiting red dwarf stars – and because red dwarfs are common types of star, this means that rocky planets may be commonplace in the Milky Way.
A survey using gravitational microlensing suggest that exoplanets are the exception rather than the rule in the Milky Way – and that small planets like Earth are more common than gas and ice giants.
The Bullet Cluster famously allows mapping of the dark matter distribution during the merger of two clusters. Now a merging cluster named the Musket Ball shows a later stage in the process.
Planets are not necessarily vaporized when a red giant star expands; the cores of gas giants may survive, but they would not be pleasant places to live. Data from NASA's Kepler mission has revealed two small planets orbiting a star after its red giant phase.

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