Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: alfa015 on 14/12/2019 00:52:29

Title: ESPRESSO: The Decisive Spectrograph to Find Earth 2.0
Post by: alfa015 on 14/12/2019 00:52:29
I would like to talk about an instrument that has been sometimes overlooked: ESPRESSO.

As most of you probably know, ESPRESSO is the only current spectrograph able to detect Earth-sized planets.

I think it will be a key instrument for 2 reasons:

1- The majority of the most potentially habitable exoplanets were discovered with the radial velocity method.

2- Only 0.5 % of the Earth-like planets in the Milky Way could be detectable by using transit photometry.

Source: <spam link to personal youtube channel removed>

Do you think we will find a nearby Earth 2.0 with ESPRESSO in 2020?
Title: Re: ESPRESSO: The Decisive Spectrograph to Find Earth 2.0
Post by: Bored chemist on 14/12/2019 12:26:04
Define "nearby".
Title: Re: ESPRESSO: The Decisive Spectrograph to Find Earth 2.0
Post by: alfa015 on 15/12/2019 00:43:45
Define "nearby".

Within 10 light years.
Title: Re: ESPRESSO: The Decisive Spectrograph to Find Earth 2.0
Post by: yor_on on 15/12/2019 22:02:45
I don't think so alfa. The numbers of suns found in a ten ly sphere from Earth isn't too encouraging.

http://www.solstation.com/stars/s10ly.htm
Title: Re: ESPRESSO: The Decisive Spectrograph to Find Earth 2.0
Post by: alfa015 on 21/12/2019 15:17:58
I don't think so alfa. The numbers of suns found in a ten ly sphere from Earth isn't too encouraging.

http://www.solstation.com/stars/s10ly.htm

That's true, but K-type stars are considered to be better for life as we know it.