Désolé ! Cette page n'est pas disponible dans la langue que vous avez choisie. Nous vous la proposons donc dans sa version originale
Page saved successfully
Couldn't save page :( Please try again.
Observations
ESO Observations of Comet Tempel 1
FORS2 Image of the Comet taken on July 2, 2005 FORS2 image of Comet Tempel 1, taken during the night of July 2 to 3, 2005. The R-band image appears in a logarithmic grey scale on the left. On the right image, it has been processed using a method that enhances the low contrast features in the coma (by subtracting a mean radial profile). This puts in evidence the various "fans" and "jets" that correspond to areas of the nucleus surface that are more active (i.e. releasing more dust and gas in space) than the surrounding. The scale in kilometres indicates the extension of the coma - the nucleus, only 6km long, is completely hidden in the single central pixel of the image.
False-colour image taken with EMMI/NTT False-colour image of Comet Tempel 1 observed with EMMI on the NTT during the night of July 2-3, 2005. Background stars passing through the field of view due to the motion of the comet, appear like a "string of pearls" at the upper edge of the image. The colour coding in these star trails represents the usage of three filters transmitting light in different wavelength regions in the blue and UV part of the spectrum: red colour represents the transmission filter for light typical for C3 gas, green for the CN gas and blue for dust reflected sunlight in the coma. The field of view is 6 x 6 arcmin, i.e. 133000 x 133000 km at the distance of the comet. North is up and East is to the right. In the image the sun is on the right hand side of the comet.
Spectra of Comet 9P/Tempel 1 (EMMI/NTT and UVES/VLT) A high quality spectrum covering the full optical range has recently been obtained with the UV-Visual Echelle Spectrograph (UVES) at the Very Large Telescope (VLT) KUEYEN telescope at Paranal and will serve as a reference to which post impact data will be compared. This high quality spectrum contains information about the composition of the material coming from the crust of the nucleus and will serve as a reference to which post impact data will be compared. A few days before the UVES observations, two lower resolution spectra were also obtained with EMMI, the spectrograph of the NTT at the La Silla Observatory (Chile). Similiar long-slit spectra will be obtained during the six nights following the date of the impact using the instrument FORS2 mounted on the VLT ANTU telescope at Paranal Observatory. These spectra will allow astronomers at ESO to detect molecules released. See more info on the Looking for molecules page.
Comet 9P/Tempel 1 (EMMI/NTT) New image of Comet 9P/Tempel 1 taken with the EMMI instrument on ESO's New Technology Telescope at La Silla on May 31. The image is rather similar to the one taken one month earlier, which is good news as it indicates no major change in the activity of the comet, making it more easy to discern the effects of the impact. The image was taken as part of the continuous monitoring of the Comet. Read more about it here. Details on how this image was produced from the raw image is also available.
Comet 9P/Tempel 1 (1.54m Danish Telescope, La Silla) Comet Tempel 1 observed, as part of the PLANET collaboration, on June 11 with the Danish 1.54m telescope at ESO, La Silla, Chile. Apart from the comet, a satellite is seen passing right over La Silla, marking its track through the upper right part of the image. The meteor-like trail of the satellite is caused by rapid small-scale changes in the atmosphere during the exposure. The trail is approximately 1 arcminute long, and will have been passed by the satellite in less than a second. During the 800 second long exposure, the telescope was following the comet's movement over the sky, which cause the stars to form small stripes on the exposure. Gas evaporating from the comet, forms the 100,000 km large coma of gas seen in the picture. The Sun is toward the upper left of the picture, causing the elongated form of the comets coma. Here, only 3 weeks before the impact, there is no trace of major gas eruptions in the comet, and it is hoped that this situation will continue until the impact on July 4, because no natural activity from the comet itself, will make it easier to interpret the effect of the man-made impact on July 4. The observer was Uffe Grae Joergensen from the Niels Bohr Institute, Copenhagen, Denmark.
You can compare these images with one image taken by the Deep Impact spacecraft.
Our use of Cookies
We use cookies that are essential for accessing our websites and using our services. We also use cookies to analyse, measure and improve our websites’ performance, to enable content sharing via social media and to display media content hosted on third-party platforms.
You can read manage your cookie preferences and find out more by visiting 'Cookie Settings and Policy'.
ESO Cookies Policy
The European Organisation for Astronomical Research in the Southern Hemisphere (ESO) is the pre-eminent intergovernmental science and technology organisation in astronomy. It carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities for astronomy.
This Cookies Policy is intended to provide clarity by outlining the cookies used on the ESO public websites, their functions, the options you have for controlling them, and the ways you can contact us for additional details.
What are cookies?
Cookies are small pieces of data stored on your device by websites you visit. They serve various purposes, such as remembering login credentials and preferences and enhance your browsing experience.
Categories of cookies we use
Essential cookies (always active): These cookies are strictly necessary for the proper functioning of our website. Without these cookies, the website cannot operate correctly, and certain services, such as logging in or accessing secure areas, may not be available; because they are essential for the website’s operation, they cannot be disabled.
Cookie ID/Name
Description/Purpose
Provider (1st party or 3rd party)
Browser session cookie or Stored cookie?
Duration
csrftoken
XSRF protection token. We use this cookie to protect against cross-site request forgery attacks.
1st party
Stored
1 year
user_privacy
Your privacy choices. We use this cookie to save your privacy preferences.
1st party
Stored
6 months
_grecaptcha
We use reCAPTCHA to protect our forms against spam and abuse. reCAPTCHA sets a necessary cookie when executed for the purpose of providing its risk analysis. We use www.recaptcha.net instead of www.google.com in order to avoid unnecessary cookies from Google.
3rd party
Stored
6 months
Functional Cookies: These cookies enhance your browsing experience by enabling additional features and personalization, such as remembering your preferences and settings. While not strictly necessary for the website to function, they improve usability and convenience; these cookies are only placed if you provide your consent.
Cookie ID/Name
Description/Purpose
Provider (1st party or 3rd party)
Browser session cookie or Stored cookie?
Duration
Settings
preferred_language
Language settings. We use this cookie to remember your preferred language settings.
1st party
Stored
1 year
ON | OFF
sessionid
ESO Shop. We use this cookie to store your session information on the ESO Shop. This is just an identifier which is used on the server in order to allow you to purchase items in our shop.
1st party
Stored
2 weeks
ON | OFF
Analytics cookies: These cookies collect information about how visitors interact with our website, such as which pages are visited most often and how users navigate the site. This data helps us improve website performance, optimize content, and enhance the user experience; these cookies are only placed if you provide your consent. We use the following analytics cookies.
Matomo Cookies:
This website uses Matomo (formerly Piwik), an open source software which enables the statistical analysis of website visits. Matomo uses cookies (text files) which are saved on your computer and which allow us to analyze how you use our website. The website user information generated by the cookies will only be saved on the servers of our IT Department. We use this information to analyze www.eso.org visits and to prepare reports on website activities. These data will not be disclosed to third parties.
On behalf of ESO, Matomo will use this information for the purpose of evaluating your use of the website, compiling reports on website activity and providing other services relating to website activity and internet usage.
ON | OFF
Matomo cookies settings:
Cookie ID/Name
Description/Purpose
Provider (1st party or 3rd party)
Browser session cookie or Stored cookie?
Duration
Settings
_pk_id
Stores a unique visitor ID.
1st party
Stored
13 months
_pk_ses
Session cookie temporarily stores data for the visit.
1st party
Stored
30 minutes
_pk_ref
Stores attribution information (the referrer that brought the visitor to the website).
1st party
Stored
6 months
_pk_testcookie
Temporary cookie to check if a visitor’s browser supports cookies (set in Internet Explorer only).
1st party
Stored
Temporary cookie that expires almost immediately after being set.
Additional Third-party cookies on ESO websites: some of our pages display content from external providers, e.g. YouTube.
Such third-party services are outside of ESO control and may, at any time, change their terms of service, use of cookies, etc.
YouTube: Some videos on the ESO website are embedded from ESO’s official YouTube channel. We have enabled YouTube’s privacy-enhanced mode, meaning that no cookies are set unless the user actively clicks on the video to play it. Additionally, in this mode, YouTube does not store any personally identifiable cookie data for embedded video playbacks. For more details, please refer to YouTube’s embedding videos information page.
Cookies can also be classified based on the following elements.
Regarding the domain, there are:
First-party cookies, set by the website you are currently visiting. They are stored by the same domain that you are browsing and are used to enhance your experience on that site;
Third-party cookies, set by a domain other than the one you are currently visiting.
As for their duration, cookies can be:
Browser-session cookies, which are deleted when the user closes the browser;
Stored cookies, which stay on the user's device for a predetermined period of time.
How to manage cookies
Cookie settings: You can modify your cookie choices for the ESO webpages at any time by clicking on the link Cookie settings at the bottom of any page.
In your browser: If you wish to delete cookies or instruct your browser to delete or block cookies by default, please visit the help pages of your browser:
Please be aware that if you delete or decline cookies, certain functionalities of our website may be not be available and your browsing experience may be affected.
You can set most browsers to prevent any cookies being placed on your device, but you may then have to manually adjust some preferences every time you visit a site/page. And some services and functionalities may not work properly at all (e.g. profile logging-in, shop check out).
Updates to the ESO Cookies Policy
The ESO Cookies Policy may be subject to future updates, which will be made available on this page.
Additional information
For any queries related to cookies, please contact: pdprATesoDOTorg.
As ESO public webpages are managed by our Department of Communication, your questions will be dealt with the support of the said Department.
