Anna practicing her Radio Astronomy talk, in preparation for ESP's Firestorm event: three hours of MIT students delivering five-minute talks on any topic of their choice.
Im an amateur astronomer. For the longest time, i've wondered how radio telescopes work. This overview is absolutely brilliant. Just the right amount of technicalities. Thanks for the overview!
Radio astronomy is wonderful. I am a ham (amateur radio operator), and i love to do astrophotography, but radio astronomy is on my list for the longest time. Time to start looking into ways to build my own dish and setup.
Around the clock, all-weather observation is another advantage. Day or night, clear or overcast, doesn't matter to radio. That, in turn, probably also makes finding a suitable location easier than for an optical telescope.
Imteresting fact. Interferometry isn't just unique to radio telescopes. It works with any wavelength. We've used optical interferometry to measure the diameter of stars for decades. We've also more recently been using it to create higher angular resolution than can be achieved with a single reflector
This is a great overview/intro to radio astronomy. I'd love a more detailed explanation of how radio waves received on our ground-based dish telescopes are turned into the images we see.
I'm an amateur astrophotographer I agree with you that optical astronomy is a less informative but when it comes to how easy it is that anyone can do it I have done a alot a astrophotography And now I'm going to radio astronomy 🙂🙂
2:07 On the main wiki says the supermassive black holes (SBHs) being at the center of galaxies is still a theoretically prediction, along saying SMBs may spawn SWHs.
Anna, I am looking for radio application to make visual radio images as you demonstrate here. Can you please let me know what application I need and where to get? Wow , 2012 and its 2018!
0:46 Questions: 1. Is a radio telescope like a one pixel camera which is being scanned across the sky? 2. Or does it get the whole picture instantaneously without moving the dish? 3. Are the all the dishes in a dish array aligned in parallel or are they pointed at different angles at the object of interest? Thx!
Hi Johannes, I did not make this video but I'm a radio astronomer. I hope this helps: 1) Yes a radio telescope is like a one pixel camera that is sensitive to a specific range of frequencies. You usually "tune" the telescope to the specific frequency corresponding to the emission line that you want to observe. For example the famous black hole picture was taken at a frequency of 230 GHz, which corresponds to carbon monoxide emission. 2) You can take a whole picture or "map" as we like to call it by moving the dish. In order to get a 3x3 pixel picture (lol) you need 9 pointing. There are other techniques for imaging in the radio like on the fly mapping or interferometry (this last one is what produced the black hole image) 3) Short answer is that they are aligned in parallel, but other factors come into play like Earth's rotation, elevation of the dishes, distance between the dishes etc. This is why the telescopes needed atomic clocks, to have extremely precise time-keeping and be able to account for all these effects and finally construct the image.
Hi there. Is there some way to build a radio telescope with a sat-antenna, to then map a small bunch of wavelengths to colors in the visible spectrum. I would like to build said telescope (atleast partially) to then hopefully take a picture of a deep sky object. Thats my idea for a school project but I'm not sure if this is somehow realisable. The picture doesn't have to be good but I need some sort of result to my initial scientific question and thus the root of my project. Any help wheter I might be able to do that is much appreciated! Have a nice day.
Don't know if you've had a response yet, but essentially you have a radio antenna(s) that are able to see the "noise floor" and give you a number representative of the received noise or signal strength for a specific spot in the sky. Now scan your antenna past the source or object in the sky you wish to study and measure/record the noise/signal strength as you scan. Immediately go back to where you started and adjust your antenna to look a slight bit farther away from where you started and then scan one more time, just like before. Do this a few dozen times and you end up with a a "topographical" representation consisting of signal strength readings. You can then make all low numbers = red and higher number = violet. Poof...you end up with a "picture" of a radio source. It isn't that simple in practice, but close.
I’m a 15 year old and I would like to know what path I should go to be able to become a radio astronomer? I understand doing well in school is one thing but what are the specific subjects I need to take note of? And does it need to be a specific school or do I need to be trained? Would like to get some advice since I always dream of being an astronomer at a young age until now!
so far there are several videos like this giving the fundamentals of radio Astronomy. Where are the home how to make step-by-step and use a radio telescope? 🧐 thanks.
Here is an excellent resource of beginner ( and advanced ) level radio astronomy videos from members of SARA : Society of Amateur Radio Astronomy www.youtube.com/@radio-astronomy/playlists Hydrogen Line Radio Telescopes ( including my video ) ru-vid.com/group/PLCEbOD5_znsmOAz8fcIIF9JC-qogFntQN Regards, Alex KK4VB
I don’t understand why astronomy are wavelength classified. Radio wave, microwave, IR, visible wave, ultraviolet, x-ray-wave etc. are those electromagnetic waves?
Do u use a prism?what's in the black in the picture of the big bang ? what is the matter what is the elements spreading out into how many diamentions are there ? Do you believe in string theory? I have a exact mathematical model of the way the space is spreading and what is going to happen again I understand everything after a head injury I'm so deep in another level of learning it's so lonely as very few ppl understand the situation the process of being able to read science mainly physics and chemistry I'm lost in my own mind
Sorry for the stupid question, but how does a radio telescope read a newspaper!? The realm of the printed page is within the visible spectrum, isn't it!?
Still fighting with feed construction for my 80 cm antenna dish. It is all wrong. F/D ratio is wrong, too much noise compared to 1.42 GHz weak signal of neutral hydrogen.
@@rowshambow So ask yourself , Japan went to the moon, why didn't they veer over to where the US had been and show some of the artifacts. Did they leave the land rover on the moon ? the flag ? show it .
Great info hun. But lets cut the crap and focus on the important part. Will december be good for me. Im a cancer. 🤗 i have a hard time figuring that out on my clockradio on am band and tinfoil...
