ESO Announcement To Address Reports Of Proxima Centauri Exoplanet

Article Updated: 23 Aug , 2016
by

For years, exoplanet hunters have been busy searching for planets that are similar to Earth. And when earlier this month, an unnamed source indicated that the European Southern Observatory (ESO) had done just that – i.e. spotted a terrestrial planet orbiting within the star’s habitable zone – the response was predictably intense.

The unnamed source also indicated that the ESO would be confirming this news by the end of August. At the time, the ESO offered no comment. But on the morning of Monday, August 22nd, the ESO broke its silence and announced that it will be holding a press conference this Wednesday, August 24th.

No mention was made as to the subject of the press conference or who would be in attendance. However, it is safe to assume at this point that it’s main purpose will be to address the burning question that’s on everyone’s mind: is there an Earth-analog planet orbiting the nearest star to our own?

Artist’s impression of a sunset seen from the surface of an Earth-like exoplanet. Credit: ESO/L. Calçada

Artist’s impression of a sunset seen from the surface of an Earth-like exoplanet. Credit: ESO/L. Calçada

For years, the ESO has been studying Proxima Centauri using the La Silla Observatory’s High Accuracy Radial velocity Planet Searcher (HARPS). It was this same observatory that reported the discovery of a planet around Alpha Centauri B back in 2012 – which was the “closest planet to Earth” at the time – which has since been cast into doubt.

Relying on a technique known as the Radial Velocity (or Doppler) Method, they have been monitoring this star for signs of movement. Essentially, as planets orbit a star, they exert a gravitational influence of their own which causes the star to move in a small orbit around the system’s center of mass.

Ordinarily, a star would require multiple exoplanets, or a planet of significant size (i.e. a Super-Jupiter) in order for the signs to be visible. In the case of terrestrial planets, which are much smaller than gas giants, the effect on a star’s orbit would be rather negligible. But given that Proxima Centauri is the closest star system to Earth – at a distance of 4.25 light years – the odds of discerning its radial velocity are significantly better.

Artist's impression of the Earth-like exoplanet discovered orbiting Alpha Centauri B iby the European Southern Observatory on October 17, 2012. Credit: ESO

Artist’s impression of the Earth-like exoplanet discovered orbiting Alpha Centauri B iby the European Southern Observatory on October 17th, 2012. Credit: ESO

According to the source cited by the German weekly Der Speigel, which was the first to report the story, the unconfirmed exoplanet is not only believed to be “Earth-like” (in the sense that it is a rocky body) but also orbits within it’s stars habitable zone (i.e. “Goldilocks Zone”).

Because of this, it would be possible for this planet to have liquid water on its surface, and an atmosphere capable of supporting life. However, we won’t know any of this for certain until we can direct the next-generation of telescopes – like the James Webb Space Telescope or Transiting Exoplanet Survey Satellite (TESS) – to study it more thoroughly.

This is certainly an exciting development, as confirmation will mean that there is planet similar to Earth that is within our reach. Given time and the development of more advanced propulsion systems, we might even be able to mount a mission there to study it up close!

The press conference will start at 1 p.m. Central European Time (CET) – 1 p.m. EDT/10 a.m. PDT. And you bet that we will be reporting on the results shortly thereafter! Stay tuned!

Further Reading: Seeker

, , , , , ,



6 Responses

  1. Jeffrey Boerst says:

    Seeing the 1st images of an exoplanet from a nano-sat swarm, on my death bed (I just turned 50 last Saturday) would allow me to die fulfilled…

  2. BCstargazer says:

    To Be Continued…Next Time… Same Channel

    https://youtu.be/VjH8pA46tLk

  3. FarAwayLongAgo says:

    On September 14th, three weeks from now, the Gaia space telescope mission people will release their first precision measurement data of a billion stars or so. The closest one certainly being the most well measured one. I cannot help but think that this is related to that, that they have insider data and guess worked some ground based astrometry from it to get a headline in front of the legally gagged Gaia crew.

    And poor blogs like this try to profit ad clicks from publishing rumors from those vultures, riding on the coming headline wave.

  4. doctorjah says:

    Will the press conference be broadcast over the web?

    • BCstargazer says:

      no mention of broadcast on the ESO website.
      only a very terse notice that it will take place. maybe youtube will stream it somehow

  5. kdconod says:

    This time can’t possibly be correct – the press conference is at 1 pm CET — that’s NOT 1 pm EDT!

Comments are closed.