Language Selection

English French German Italian Portuguese Spanish

Pluto: And then there were eight

Filed under
Sci/Tech

Pluto has just been demoted. The celestial body, long known as one of the nine planets of the solar system, will now be considered a "dwarf planet," the General Assembly of the 2006 International Astronomical Union ruled in a vote Thursday in Prague, Czech Republic.

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune will be defined as "classical planets."

The IAU said in a statement on Thursday that the definition for planet is now officially "a celestial body that (a) is in orbit around the Sun, (Cool has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape and (c) has cleared the neighborhood around its orbit."

Full Story.

Textbook makers grapple with Pluto demotion.

Stick to Computer Rants

As any high school physics student will tell you, CENTRIPETAL FORCE is what influences the orbital path.

MASS is completely INDEPENDENT of size or distance from the sun (or any other body in the universe).

The boundaries of the Universe has NOTHING to do with how far something is from our Sun.

I think it's safe to say that even on a bad day, an Astrophysicist has a better understanding of simple physics then you do.

The new planetary definition has nothing to do with physics and everything to do with nomenclature. As more and more orbiting bodies are found within our solar system, as well as in other star systems, the IAU wanted a more accurate way of defining what that body is. Since the original definitions predated Newton, I'd say it was about time to bring things up to date.

I feel sad for Pluto. I

I feel sad for Pluto. I think that they should keep Pluto as a planet if only for the more than 75 years of being known as one. They could easily correct its status by way of explanation in text books.It can be taught in schools that Pluto is not really a planet according to the new definition, but it will be kept in the list of 9 major planets. Then new discoveries can be placed in subgroups like "dawrf planets"and other terms they came up with. Or if they're going to remove Pluto, might as well use the term "plutonian objects"; sort of like a tribute.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

More in Tux Machines

Servers and Red Hat

Distribution Releases

  • OpenMandriva Is Going To Do Away With 32-bit Support
    Following in the steps of Ubuntu 17.10 dropping 32-bit desktop images and other Linux distributions also lessening their focus on 32-bit support, OpenMandriva has issued its final i586 release. OpenMandriva Lx 3.03 was released on Tuesday with boot speed improvements, updates to Linux/systemd/Mesa, KDE Plasma 5.10.5, LLVM Clang 5.0, and other package upgrades. This is also going to be their last planned release in the OpenMandriva Lx 3 series.
  • OpenMandriva Lx 3.03 - Get it while it’s hot!
    This release Lx 3.03 is an enhancement and upgrade to the previous Lx 3 releases.
  • LXLE 16.04.3 "Eclectica" Linux Distro Is Out Now Based on Ubuntu 16.04.3 LTS
    The developers of the Ubuntu-based LXLE GNU/Linux distribution have announced the release of LXLE 16.04.3, the latest update to the Eclectica series based on Ubuntu 16.04 LTS (Xenial Xerus). Incorporating all the updates and core components of Ubuntu 16.04.3 LTS, the LXLE 16.04.3 release is here to further integrate various of the components of the MATE and LXQt desktop environments, as well as some from the Linux Mint operating system. On top of that, the application menu received improvements to its layout and how items are organization, the system theme was tweaked for consistency, LXhotkey replaces the Obkey Openbox key editor, and Pithos has been removed because it required a user account.
  • pfSense 2.4.2 Open-Source Firewall Patches OpenSSL, Improves Network Performance
    Netgate's Jim Pingle announced the availability of the second maintenance and stabilization update to the latest 2.4 series of pfSense, world's most trusted open-source firewall. pfSense 2.4.2 is a security and bugfix release that updates the OpenSSL packages to version 1.0.2m to fix two recently disclosed vulnerabilities (CVE-2017-3736 and CVE-2017-3735), addresses three potential XSS vectors, fixes the VLAN priority handling, and addresses issues with PPP interfaces that have VLAN parents.

Games Leftovers

OSS Leftovers

  • Julita Inca Chiroque: Parallel Computing Talk
  • Open Source Monitoring Conference: Speakers, Agendas, and Other Details
    One of today’s leading tech conferences, the Open Source Monitoring Conference (OSMC), is back to bring together some of the brightest monitoring experts from different parts of the world. The four-day event will be held at Holiday Inn Nuremberg City Conference in Germany starting today, November 21st, until November 24th.
  • Why a Dallas-area tech startup opened a KC office
  • Open education: How students save money by creating open textbooks
    Most people consider a college education the key to future success, but for many students, the cost is insurmountable. The growing open educational resource (OER) movement is attempting to address this problem by providing a high-quality, low-cost alternative to traditional textbooks, while at the same time empowering students and educators in innovative ways. One of the leaders in this movement is Robin DeRosa, a professor at Plymouth State University in New Hampshire. I have been enthusiastically following her posts on Twitter and invited her to share her passion for open education with our readers. I am delighted to share our discussion with you.