NGC 7009: The Saturn Nebula
The layers of the Saturn Nebula give a complex picture of how this planetary nebula was created. The above picture, taken in April 1996 and released last week, allows a better understanding of the mysterious process that transformed a low-mass star into a white dwarf star. A computer model indicates that the central star of NGC 7009 first expelled the green gas that now appears barrel shaped. This green gas now confines stellar winds flowing from the central star, creating a jet which forms the ansae that appear in red at the tips. Much remains unknown, including why the gas has not become turbulent.
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Section I: General Terms
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- Disclaimer of Warranty and Limitation of Liability
- Amendment of the Terms
- Submitting Content
- Copyright in Your Content
- Monitoring Content
- Storage Policy
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- Payment Policy
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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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Artist Materials - As a registered member of the Service, you will also be granted the privilege of submitting certain types of your content, known as "Artist Materials," for display on your user page. Prior to submitting Artist Materials, you must accept the additional terms and conditions of the Submission Policy, which is incorporated into, and forms a part of, the Terms.
Arthola does not claim ownership rights in your Content. For the sole purpose of enabling us to make your Content available through the Service, you grant to Arthola a non-exclusive, royalty-free license to reproduce, distribute, re-format, store, prepare derivative works based on, and publicly display and perform your Content. Please note that when you upload Content, third parties will be able to copy, distribute and display your Content using readily available tools on their computers for this purpose although other than by linking to your Content on Arthola any use by a third party of your Content could violate paragraph 4 of these Terms and Conditions unless the third party receives permission from you by license.
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.
At this time, Arthola provides free online storage of your Content to registered members of the Service. However, you acknowledge and agree that Arthola may, at its option, establish limits concerning your use of the Service, including without limitation the maximum number of days that your Content will be retained by the Service, the maximum size of any Content files that may be stored on the Service, the maximum disk space that will be allotted to you for the storage of Content on Arthola's servers. Furthermore, you acknowledge that Arthola reserves the right to terminate or suspend accounts that are inactive, in Arthola's sole discretion, for an extended period of time (thus deleting or suspending access to your Content). Without limiting the generality of Section 9, Arthola shall have no responsibility or liability for the deletion or failure to store any Content maintained on the Service and you are solely responsible for creating back-ups of your Content. You further acknowledge that Arthola reserves the right to modify its storage policies from time to time, with or without notice to you.
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:
for any unlawful purposes; to upload, post, or otherwise transmit any material that is obscene, offensive, blasphemous, pornographic, unlawful, threatening, menacing, abusive, harmful, an invasion of privacy or publicity rights, defamatory, libelous, vulgar, illegal or otherwise objectionable; to upload, post, or otherwise transmit any material that infringes any copyright, trade mark, patent or other intellectual property right or any moral right or artist's right of any third party including, but not limited to, Arthola or to facilitate the unlawful distribution of copyrighted content or illegal content;to harm minors in any way, including, but not limited to, uploading, posting, or otherwise transmitting content that violates child pornography laws, child sexual exploitation laws or laws prohibiting the depiction of minors engaged in sexual conduct, or submitting any personally identifiable information about any child under the age of 13; to forge headers or otherwise manipulate identifiers in order to disguise the origin of any Content transmitted through the Service; to upload, post, or otherwise transmit any material which is likely to cause harm to Arthola or anyone else's computer systems, including but not limited to that which contains any virus, code, worm, data or other files or programs designed to damage or allow unauthorized access to the Service which may cause any defect, error, malfunction or corruption to the Service;for any commercial purpose, except as expressly permitted under these Terms; to sell access to the Service on any other website or to use the Service on another website for the primary purpose of gaining advertising or subscription revenue other than a personal blog or social network where the primary purpose is to display content from Arthola by hyperlink and not to compete with Arthola.
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.