HH1/HH2: Star Jets
A cloud of interstellar gas and dust collapses and a star is born. At its core temperatures rise, a nuclear furnace ignites, and a rotating dusty disk forms surrounding the newborn star. According to current understanding, as material continues to fall onto the disk it is heated and blasted back out along the disk's axis of rotation, forming a pair of high speed jets. This Hubble Space Telescope image shows two nebulosities at the ends of opposing jets from a young star. The bright blobs at either end are where the jet material has slammed into interstellar gas. Tip to tip, the distance is about one light-year. Located near the Orion Nebula, these nebulosities have catalog designations HH1 and HH2 for their discoverers astronomers George Herbig and Guillermo Haro. The nascent star which produced the jets is in the middle, hidden by a cloud of obscuring dust. Yet the structures and details visible in the star jets offer clues to events which also occured in our own Solar System - when the Sun was formed from a collapsing interstellar cloud 4.5 billion years ago.
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Section I: General Terms
- Reporting Copyright Violations
- External Links
- Third Party Software
- Disclaimer of Warranty and Limitation of Liability
- Amendment of the Terms
- Submitting Content
- Copyright in Your Content
- Monitoring Content
- Storage Policy
- Suspension and Termination of Access and Membership
- Payment Policy
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ARTHOLA MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED AS TO THE OPERATION OF THE SERVICE, OR THE CONTENT OR PRODUCTS, PROVIDED THROUGH THE SERVICE. YOU EXPRESSLY AGREE THAT YOUR USE OF THE SERVICE IS AT YOUR SOLE RISK. ARTHOLA DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT, TO THE FULLEST EXTENT PERMITTED BY LAW. ARTHOLA MAKES NO WARRANTY AS TO THE SECURITY, RELIABILITY, TIMELINESS, AND PERFORMANCE OF THIS SERVICE. YOU SPECIFICALLY ACKNOWLEDGE THAT ARTHOLA IS NOT LIABLE FOR YOUR DEFAMATORY, OFFENSIVE OR ILLEGAL CONDUCT, OR SUCH CONDUCT BY THIRD PARTIES, AND YOU EXPRESSLY ASSUME ALL RISKS AND RESPONSIBILITY FOR DAMAGES AND LOSSES ARISING FROM SUCH CONDUCT. EXCEPT FOR THE EXPRESS, LIMITED REMEDIES PROVIDED HEREIN, AND TO THE FULLEST EXTENT ALLOWED BY LAW, ARTHOLA SHALL NOT BE LIABLE FOR ANY DAMAGES OF ANY KIND ARISING FROM USE OF THE SERVICE, INCLUDING BUT NOT LIMITED TO DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL, EXEMPLARY, OR PUNITIVE DAMAGES, EVEN IF ARTHOLA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE FOREGOING DISCLAIMERS, WAIVERS AND LIMITATIONS SHALL APPLY NOTWITHSTANDING ANY FAILURE OF ESSENTIAL PURPOSE OF ANY LIMITED REMEDY. SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF OR LIMITATIONS ON CERTAIN WARRANTIES OR DAMAGES. THEREFORE, SOME OF THE ABOVE EXCLUSIONS OR LIMITATIONS MAY NOT APPLY TO YOU. IN NO EVENT SHALL ARTHOLA'S AGGREGATE LIABILITY TO YOU EXCEED THE AMOUNTS PAID BY YOU TO ARTHOLA PURSUANT TO THIS AGREEMENT.
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If you have any comments or questions about the Service please contact us by email.
If you have any comments or questions about the Service please contact us by email.
Section II: Additional Terms
To register as a member of the Service or purchase products, you must be 13 years or lawfully permitted to enter into and form contracts under applicable law. In no event may minors submit Content to the Service. You agree that the information that you provide to us upon registration, at the time of purchase, and at all other times will be true, accurate, current and complete. You also agree that you will ensure that this information is kept accurate and up to date at all times. This is especially important with respect to your email address, since that is the primary way in which we will communicate with you about your account and your orders.
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Arthola has no ability to control the Content you may upload, post or otherwise transmit using the Service and does not have any obligation to monitor such Content for any purpose. You acknowledge that you are solely responsible for all Content and material you upload, post or otherwise transmit using the Service.
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You are responsible for all of your Content you upload, download, and otherwise copy, distribute and display using the Service. You must have the legal right to copy, distribute and display all parts of any content that you upload, download and otherwise copy, distribute and display. Content provided to you by others, or made available through websites, magazines, books and other sources, are protected by copyright and should not be uploaded, downloaded, or otherwise copied, distributed or displayed without the consent of the copyright owner or as otherwise permitted by law.
You agree not to use the Service:
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You agree that Arthola may at any time, and without notice, suspend or terminate any part of the Service, or refuse to fulfill any order, or any part of any order or terminate your membership and delete any Content stored on the Arthola Site, in Arthola's sole discretion, if you fail to comply with the Terms or applicable law.
Arthola MAY provide payments to members based on "like$" your content generates. "Like$" do not have monetary value until actual payment is remitted. Arthola provides payments strictly at its own discretion based on internal criteria that incorporate the like-ability of your content as well as a number of other tools that could be changed at any time. Arthola may refuse to remit payment to you and terminate your account at its own discretion, and especially if suspicion of fraudulent activities have been established, incuding but not limited to multiple account usage, crosslinked "like$", as well as any of our terms of service have been violated. If Arthola selects to remit a payment to you via the financial providers that we work with, upon receipt you are solely responsible to report the payment to your tax authority. Failure to do so will be considered a violation of our terms of service and your account could be terminated.
Members cannot claim monetary compensation from Arthola. Arthola provides payments at its own discretion.