[ExI] kepler study says 8.8e9 earthlike planets

[Tomaz Kristan]

> Actually, no it cannot do that.

I can. Now NASA wants TESS mission to do the spectroscopy and oxygen
search. I don't know when it was postponed to  the next mission. But
originally was advertised for Kepler.




On Mon, Nov 11, 2013 at 1:47 PM, Alfio Puglisi <alfio.puglisi at gmail.com>wrote:

>
>
>
> On Mon, Nov 11, 2013 at 12:25 PM, Tomaz Kristan <protokol2020 at gmail.com>wrote:
>
> > BTW, as I can recall, Kepler was supposed to  be able to detect free
> oxygen on those far away planets. Or it was just a NASA's marketing, like
> these 10^10 Goldilocks planets now.
>
> Actually, no it cannot do that. Kepler only detect brightness changes,
> when a planet partly eclipses its star relative to us. In order to detect
> oxygen, you'll need observations with telescopes capable of taking spectra.
> While most ground-based telescope are equipped for that, I don't know if
> any of them are sensitive enough - those planets are extremely faint.
>
> Alfio
>
>
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