NASA's Kepler Mission Extended For Two Years
An anonymous reader writes "A report just released from NASA's senior review panel recommends extending the Kepler mission(Pdf), initially for two years. 'Kepler is not only a unique source of exoplanet discoveries, but also an organizing and rallying point for exo-planet research. It has enabled remarkable stellar science." The scaled-down budget for the extended mission was broadly expected to include funding only for continued operations and management, with no funding for science. Astronomers have already started seeking private funding to continue their Kepler-related work, through crowd-funding websites like PetriDish and FundaGeek, as well as through the non-profit Pale Blue Dot project."
But I think already we have the important data: thousands of planets! And these are just that tiny fraction that have orbits that take them across the line between their sun and ours. Thousands of times as many planets have orbits that would not cause a transit.
The point is we now have enough data to estimate the density of planets in the galaxy. So you could say the basic goals of Kepler have been accomplished and the rest is gravy.
The Review panel agrees with you, and even goes further to politely tap the Kepler science team on the bottom and to try to point them in the right direction. Looking at the "Proposal Weaknesses" section (emphasis is my addition):
Since masses cannot be determined, Kepler can only directly measure an upper limit to [the frequency of Earth-like planets]. The proposal over-emphasizes the capability of Kepler to directly determine [the frequency of Earth-like planets] as compared to the contribution of Kepler determination of exoplanet statistics. The strong focus of the proposal on the detection of a few (e.g. 0 – 20) “Earth-like” bodies leaves the plan subject to criticism for the very high dollar cost of a few new objects, few or none of which can be followed up for mass characterization through Doppler shift measurements.
So basically they are telling the Kepler science team (rightly so) to pipe down about the Earth-like planets we can't do any more science with at this time and instead talk about the amazing stuff they can do with the statistics they've gathered. This is not even talking about what else can be done with these data; Kepler is an outstanding stellar astrophysics mission.