Name your own planet.

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For decades, the names given to newly discovered planets have almost always failed to live up to the excitement these celestial finds represent. (Take for example forgettable monikers such as CFBDSIR2149, HD 189733b, 55 Cancri e, and Kepler-69c.) The organization that oversee’s the naming of new planets, the International Astronomical Union (IAU), knows that these titles are the opposite of cool and catchy. And thankfully, something is being done about it — the IAU is moving away from leaving selective working groups to name planets and opening up the process to the public.

Unsurprisingly, there are a few rules that the IAU imposed on the new process. Proposed names must be 16 characters or less, and preferably one word. The Paris-based group asks that names are pronounceable in as many languages as possible, and not offensive in any language or culture. The group also says that submissions should be “not too similar to an existing name of an astronomical object,” such as another planet, or named dwarf planets, stars, and solar systems. Using a pet name or a name that is “purely or principally commercial in nature” is also forbidden, the IAU says.

So how do you actually suggest a name? The IAU has set up an email address for that: iaupublic@iap.fr. Submissions will “be handled on a case-by-case basis, with advice given on the best way to proceed,” the organization says. And, in case you’re wondering, it’s the IAU who will be sifting through public input and selecting the best names. The group also reserves the right to open things up to a public vote, as it did in July in the christening of Pluto’s fourth and fifth moons, Kerberos and Styx. Among the names the IAU shot down: Vulcan.

http://www.seti.org/name-the-moons-of-pluto

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What is a (exo)planet?

According to the IAU decision of 2006 a planet is a celestial body which:

is in orbit around the Sun,
has sufficient mass to assume hydrostatic equilibrium (a nearly round shape), and
has “cleared the neighbourhood” around its orbit.

and an exoplanet is a planet around another star.

So what is this?

http://www.bbc.co.uk/news/science-environment-20309762

Looks likes a planet, definitely not a star. It’s bigger than Jupiter, but not big enough to be a brown dwarf (a brown is technically a star). But it doesn’t go around a star. Instead it seems to wander lost through space. It’s bigger than Jupiter, but not big enough to be a brown dwarf (a brown is technically a star). So what word should use to describe it?

Pluto

Pluto.
My students hate it when I tell them Pluto is not a planet. After all, many are from las cruces and even went to the Tombaugh school. But the one thing they hate even more than being told it, is when they work through the logic themselves and then decide it is not a planet. It raise tow interesting debates though.

The first stage of all science seems to be noticing and grouping. Then, after years of making new discoveries we always go back to the the grouping. Somehow we feel the need to reclassify

Second, who should make these decisions on reclassifying. The scientists or the public?