How to Make Images with a Radio Telescope
I believe that this question has been answered before in our post answering the question How Does a Single Dish Telescope Make Images? If you are interested in how a collection of radio telescopes is...
View ArticleWhat Do We Know About Black Holes?
I believe that the information on the Space.com summary of what we know about black holes will provide you with the background information you are looking for. The post What Do We Know About Black...
View ArticleHow Many Pixels in an Image can be Collected Simultaneously and How Long Does...
There is no solid upper-limit to the number of pixels that can be collected in a single image gathered with an astronomical telescope. Imaging sensors on both optical and radio telescopes can have...
View ArticleHas Voyager 1 Left Our Solar System?
NASA has stated that the Voyager 1 space craft exited the Solar System on August 25, 2012. I believe that the estimate of the size of the Solar System of 22 light hours, which is about 159...
View ArticleCareers in Astronomy Which Combine Science and Art
One example of how one can combine interests in both astronomy and art is to ultimately work in astronomy’s many education and public outreach activities. I believe that a reasonable way to obtain the...
View ArticleIs the 23W Voyager Transmitter Power Before or After Amplification by the...
I believe that the 23W transmitter power that you quote is before amplification by the spacecraft’s antenna. The Naked Scientists Forum addressed this question several years ago, and also provided...
View ArticleHow Many Arms Does the Milky Way Galaxy Have?
The most recent analysis of the structure of our Milky Way galaxy, derived from the Spitzer Space Telescope, indicates that it has two main spiral arms. As noted in the Spitzer Space Telescope image...
View ArticleHow Far Away From Earth Could We See the Sun with the Unaided Eye?
The Sun’s absolute magnitude, which is its brightness if it were located at a distance of 10 parsecs (about 32.6 light years), is about 4.83. The human eye can see stars down to about apparent...
View ArticleWhat Do Radio Telescopes Do About Snow and Ice Accumulation?
Measurements that radio telescopes that operate at relatively long wavelengths, about one centimeter or longer, are not affected by snow or ice accumulation on their reflective surfaces. From an...
View ArticleIs Sirius in Conjunction with the Sun on July 4 Each Year?
No. It is true that Sirius is above the horizon during a good part of the day during the month of July each year, but since Sirius is located at a declination of -16 degrees, and the Sun is at a...
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