It was just last week that we reported on the oh-so-close approach to 1,000 confirmed exoplanets discovered thus far, and now it’s official: the Extrasolar Planets Encyclopedia now includes more than 1,000! (1,010, to be exact.)

21 years after the first planets beyond our own Solar System were even confirmed to exist, it’s quite a milestone!

The milestone of 1,000 confirmed exoplanets was surpassed on October 22, 2013 after twenty-one years of discoveries. The long-established and well-known Extrasolar Planets Encyclopedia now lists 1,010 confirmed exoplanets.

Not all current exoplanet catalogs list the same numbers as this depends on their particular criteria. For example, the more recent NASA Exoplanet Archive lists just 919. Nevertheless, over 3,500 exoplanet candidates are waiting for confirmation.

More ….
http://www.universetoday.com/105683/there-are-now-officially-over-1000-confirmed-exoplanets/

Pretty cool, that’s a lot more than I thought we had found.

Spiny Norman said:

Pretty cool, that’s a lot more than I thought we had found.

Bugger off, you could touch most of them :)

But we know there are trillions…

Have they found one with H2O oceans…

Thanks Bill.

That’s bloody amazing.

It doesn’t seem that long ago that people were discussing the possibility of detecting them.

dv said:

Thanks Bill.

That’s bloody amazing.

It doesn’t seem that long ago that people were discussing the possibility of detecting them.

Just over twenty-one years ago according to the article.

One day, when I’m richer than a weather-girl, I’ll buy a decent telescope for the purpose of adding to the list.

I’ll buy a decent telescope for the purpose of adding to the list.
———————————————-

Ah yeah but no…

You can’t see them.

Time flies

Spiny Norman said:

It was just last week that we reported on the oh-so-close approach to 1,000 confirmed exoplanets discovered thus far, and now it’s official: the Extrasolar Planets Encyclopedia now includes more than 1,000! (1,010, to be exact.)

21 years after the first planets beyond our own Solar System were even confirmed to exist, it’s quite a milestone!

The milestone of 1,000 confirmed exoplanets was surpassed on October 22, 2013 after twenty-one years of discoveries. The long-established and well-known Extrasolar Planets Encyclopedia now lists 1,010 confirmed exoplanets.

Not all current exoplanet catalogs list the same numbers as this depends on their particular criteria. For example, the more recent NASA Exoplanet Archive lists just 919. Nevertheless, over 3,500 exoplanet candidates are waiting for confirmation.

More ….
http://www.universetoday.com/105683/there-are-now-officially-over-1000-confirmed-exoplanets/

Pretty cool, that’s a lot more than I thought we had found.

> Pretty cool, that’s a lot more than I thought we had found.

Ditto. The number of confirmations had crept up very slowly in the past. Very much slower than the number of exoplanet candidates. I wonder what changed. The exoplanet encyclopedia catalog is offline right now. Will check later.

“confirmed” is a big word.

tauto said:

But we know there are trillions…

Maybe. The current estimate of the number of stars in the milky way is around 300 billion. Lots of those stars are in binary (or higher multiple) systems. Wikipedia says “It is estimated that approximately 1/3 of the star systems in the Milky Way are binary or multiple, with the remaining 2/3 consisting of single stars”. Which means there are roughly 200 billion star systems in the galaxy, and they’d each need an average of 5 planets to give a galactic total of a trillion planets.

OTOH, it is expected that there are also a lot of rogue planets wandering the galaxy, not gravitationally bound to a star. During star system formation, it’s quite likely for the gravitational dynamics of the system to eject one or more planets, especially in multi-star systems.

There are currently two main ways to detect extrasolar planets. We look for stars whose position or light output wobble a little bit, the idea being that these gravitational or optical perturbations are being caused by one or more planets. So it’s not easy to find planets in multiple star systems, since the perturbations due to planets are much smaller than perturbations caused by companion stars.

See Methods of detecting extrasolar planets for further details.

tauto said:

Have they found one with H2O oceans…

I doubt it. The easiest planets to find are large &/or close to their star, or so hot that we can see them in infrared; cool terrestrial planets are very hard to spot.

We don’t have much data on the chemistry of exoplanets, but in some cases, we can get some spectrographic data, as the light of the parent star gets modified passing through the planet’s atmosphere.

found out anything about this water plasma planet PM?

Riff-in-Thyme said:

found out anything about this water plasma planet PM?

I assume you mean Gliese 1214 b

I know nothing about it, apart from what Wiki says.

Looking at Extrasolar planet encyclopedia now. 1038 planets.

From the name, it’s often possible to tell where there have come from.

2Mass survey (a mid-infra-red survey) – 7 planets
CoRoT (the European planet finder spacecraft) – 24 planets
GJ & Gliese (very nearby stars) – 42 planets
HAT & HATS (a Hungarian run project) – 52 planets
HIP (Hipparcos space telescope, nearby stars) – 17 planets
KIC & KOI & Kepler (the NASA Kepler planet finder spacecraft) – 233 planets
MOA (a Japan/NZ run project to look for gravitational lensing) – 11 planets
OGLE (a Polish run project in Chile to look for gravitational lensing) – 22 planets
PSR (pulsar planets, the first ones found) – 5 planets
TrES (Trans-Atlantic Exoplanet Survey) – 5 planets
WASP (wide-angle search for planets) – 83 planets
XO( Haleakala telescope in Hawaii) – 5 planets

The rest, by far the bulk of them, are merely relatively bright stars, this includes all those identified by constellation, HD (412 planets) or BD number.

The 233 confirmed planets from Kepler is well short of the 3,400 or so planet candidates from Kepler.