Huge Asteroid Vesta Actually Is an Ancient Protoplanet

Data from the Dawn spacecraft now reveal that Vesta, as wide as the state of Arizona, is large enough to have had its own internal geologic evolution


TechMediaNetwork













Share on Tumblr

"Sunlight is moving northward on Vesta, and we will soon see the north pole regions," Russell said. "What could be there to complement what we see in the south?"

When Dawn finishes up at Vesta, it will start the long trek to the dwarf planet Ceres, which is roughly as wide as Texas. The probe is scheduled to reach the "queen of the asteroid belt" in February 2015 and embark upon a whole new round of discoveries.

"We expect that Ceres is a much wetter world" than Vesta, Russell said. But, he added, "we have no meteorites to help us here. Everything will be a surprise."

Copyright 2012 SPACE.com, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.


TechMediaNetwork

8 Comments

Add Comment
View
  1. 1. Algie 02:10 PM 5/12/12

    It would be interesting to see an article about proto-panets like Vesta and the moons of Saturn and Jupiter which are also identified as proto-planets - Like Dione. Where were they formed in the solar system, what are the relative sizes of their cores, their surface composition. Some of this must be possible now that both Jovian and Saturian systems have been surveyed extensively, especially Saturn with numerous moon flybys to date.

    Reply | Report Abuse | Link to this
  2. 2. mhenriday 09:00 AM 5/13/12

    I agree with Algie ; these are some of the most fascinating objects in the Solar System ! But in that case, please make it a longer, more detailed article....

    Henri

    Reply | Report Abuse | Link to this
  3. 3. thevillagegeek in reply to mhenriday 07:11 PM 5/13/12

    "please make it a longer, more detailed article...."

    Try reading page 2 or 3, accessed by the links with the appropriate number below the text, or by clicking the 'Next' link in the same area of the page.

    Reply | Report Abuse | Link to this
  4. 4. Quinn the Eskimo 09:39 PM 5/13/12

    Now that that is settled, perhaps we can start strip mining the thing now? Drill, baby, drill.

    Reply | Report Abuse | Link to this
  5. 5. Moto01 12:10 PM 5/14/12

    With the huge distance between mars and jupiter, and the aseroid belt contained there it seems possible that two planets may have collided and produced this belt. With some asteroids being "rocky" and others varying as partially or completly metalic suggests these formed in a process of planatary specific gravity/density like the Earth or Mars.
    I have no data to support this theory, but maybe there is.

    Reply | Report Abuse | Link to this
  6. 6. mhenriday 12:56 PM 5/14/12

    Dear «village geek», whatever made you think that I hadn't read all three pages of the above article regarding Vespa ? Whatever it was, you were sadly deluded. However, not being a member of the Tweeter generation, I do hope that any coming article on proto-planets will be alloted more than these three brief pages ; the subject certainly deserves that much....

    Henri

    Reply | Report Abuse | Link to this
  7. 7. Wayne Williamson 05:41 PM 5/17/12

    Very cool discoveries...and more to come...

    Reply | Report Abuse | Link to this
  8. 8. Grumpyoleman 07:45 AM 5/19/12

    I hope for an asteroid with commercial value, for example, solid gold, that would spur the private sector into developing the means to capture it and drag it into earth orbit for exploitation. A real viable space race would be the result. Government doesn't have the incentive to get us to where many of us wish to be.

    Reply | Report Abuse | Link to this
Leave this field empty

Add a Comment

You must sign in or register as a ScientificAmerican.com member to submit a comment.
Click one of the buttons below to register using an existing Social Account.

More from Scientific American

See what we're tweeting about

Scientific American Editors

More »

Free Newsletters


Get the best from Scientific American in your inbox

Solve Innovation Challenges

Powered By: Innocentive

  SA Digital

Latest from SA Blog Network

  SA Digital

Science Jobs of the Week

Email this Article

Huge Asteroid Vesta Actually Is an Ancient Protoplanet

X
Scientific American Magazine

Subscribe Today

Save 66% off the cover price and get a free gift!

Learn More >>

X

Please Log In

Forgot: Password

X

Account Linking

Welcome, . Do you have an existing ScientificAmerican.com account?

Yes, please link my existing account with for quick, secure access.



Forgot Password?

No, I would like to create a new account with my profile information.

Create Account
X

Report Abuse

Are you sure?

X

Institutional Access

It has been identified that the institution you are trying to access this article from has institutional site license access to Scientific American on nature.com. To access this article in its entirety through site license access, click below.

Site license access
X

Error

X

Share this Article

X