From the Kepler website:
A new planet discovery will be announced Monday Jan. 10 during the ‘Exoplanets & Their Host Stars’ presentation at the American Astronomical Society (AAS) conference in Seattle, Washington.
Natalie Batalha of the NASA Kepler Mission Team will be online answering your questions about this new planet finding on Monday, Jan. 10 from 3:30 p.m. to 4:30 p.m. EST / 12:30 p.m. to 1:30 p.m. PST. Natalie will be chatting with you live from the conference in Seattle.
The chat can be found at this website.
To summarize the mission, Kepler is a space-observatory –launched in 2009 — designed to discover Earth-like planets orbiting other stars. It has a planned mission lifetime of 3.5 years. Kepler measures light from stars, and watches for dimming which could indicate a planet transiting in front of the star. Many of the stars Kepler has observed have been variable stars — stars whose brightness changes naturally, as opposed to anything blocking some of its light. These variable stars are dropped from the target database, and replaced with new candidates.
What types of exoplanets is Kepler looking for specifically? According to the Kepler mission page:
The challenge now is to find terrestrial planets (i.e., those one half to twice the size of the Earth), especially those in the habitable zone of their stars where liquid water and possibly life might exist.
The Kepler Mission, NASA Discovery mission #10, is specifically designed to survey a portion of our region of the Milky Way galaxy to discover dozens of Earth-size planets in or near the habitable zone and determine how many of the billions of stars in our galaxy have such planets.
So far, Kepler has found more than 700 planet candidates, which require further data-analysis and ground-based observations to rule out any “false signatures”. Kepler has 8 confirmed planets. These have ranged in mass from 7.7% to more than double the mass of Jupiter. For comparison, Jupiter is 317 times more massive than the Earth — or, Earth is .3% the mass of Jupiter.
So, we wait until tomorrow (or today for many of you) to find out the details of our newly discovered exoplanet friend.