Please wait, while we are loading the content...
Please wait, while we are loading the content...
Content Provider | AstroPix |
---|---|
Description | This graph shows the temperature differences in the oldest light in the universe, called the cosmic microwave background, detected by Planck at different distances apart on the sky. The curve is known as the power spectrum. The largest distances, or angular scales, starting at angles of 90 degrees, are shown on the left side of the graph, whereas smaller and smaller scales are shown toward the right. For comparison, the diameter of the full moon in our sky measures about half a degree. Planck was able to capture the region between 0.5 and .05 degrees with far greater precision than its predecessors, revealing new information about basic traits of our universe. The red dots correspond to measurements made with Planck; these are shown with error bars that account for measurement errors as well as for estimated uncertainties due to the limited number of points in the sky where it is possible to perform measurements. This so-called cosmic variance is an unavoidable effect that becomes most significant at larger angular scales. The green curve shown in the graph represents the best fit of the "standard model of cosmology" -- currently the most widely accepted scenario for the origin and evolution of the universe -- to the Planck data. The pale green area around the curve shows the predictions of all the variations of the standard model that best agree with the data. While the observations on small and intermediate angular scales agree extremely well with the model predictions, the fluctuations detected on large angular scales on the sky -- between 90 and six degrees -- are about 10 percent weaker than the best fit of the standard model to Planck data. At angular scales larger than six degrees, there is one data point that falls well outside the range of allowed models. These anomalies suggest that some aspects of the standard model of cosmology may need rethinking. Planck is a European Space Agency mission, with significant participation from NASA. NASA's Planck Project Office is based at NASA's Jet Propulsion Laboratory, Pasadena, Calif. JPL contributed mission-enabling technology for both of Planck's science instruments. European, Canadian and U.S. Planck scientists work together to analyze the Planck data. |
File Format | TIF / TIFF |
Language | English |
Publisher Date | 2018-06-20 |
Access Restriction | Open |
Rights License | Public Domain |
Subject Keyword | Cosmology Morphology Cosmic Background |
Content Type | Image |
Educational Role | Student Teacher |
Educational Use | Self Learning Classroom |
Education Level | Any Level/Generic |
Resource Type | Chart |
Subject | Physics |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
Sl. | Authority | Responsibilities | Communication Details |
---|---|---|---|
1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |