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Seriously good video and explanation of the hydrogen 21 cm line. Thank you!

Fantastic explanation of the Hydrogen line. Really liked that. It makes detecting the spectral line even more exciting now that I know that it’s a super slow spin flip, but there’s just an absurd amount of Hydrogen atoms around that it is actually observable. Mind-blowing

Very cool

Great video! Ran across this from a link on the Cloudy Nights astronomy website. Just happen to have a satellite dish I've been wondering what to do with. The IBT will go together well with the solar filter on the telescope! Thanks for sharing! 👍

Thanks for nerding out on this!

Very good Explanation Sir, Pls tell me books or resources or TH-cam videos where I can learn this stuff more about theory part of it more .

Very informative.

Loose the carbs, get some exercise.

A very good video sir Iam too interested in Radio astronomy and some day want to build a radio telescope Iam seeing this video for the first time and little bit late I hope you achieve a high degree of practice in Radio astronomy and some day amateur telescope like yours may catch a glimpse of far away universe and black holes at the centres of many galaxies just as today's event horizon telescope does

Can you transmit on the hydrogen line frequency?

I hope i can hear God through radio someday

i stumbled into your channel and I noticeed that its been two years that you have posted a video. I liked it anyway and I am wondering if you are going to make any other video

good

Very well done! More videos please.

th-cam.com/video/sFT83ytHVo0/w-d-xo.htmlsi=jSMMML6PuZRs6itr

We are waiting for Pulsars!

Clear and loud! I like your projects and how you teach. Thank you!

Well done...

Hi. Great video. I hope you are all right. My question is how to make the calibration file? Close the receiver input with 50 Ohm load is ok. But what is the command line command that needs to do? I read the Virgo user manual but I didn't find it. Please tell me the

Oh come on now? You are punching things in on your computer. And voilà! We have no idea what you just did? You are using no screen capture software. You have no Body Cam to switch to. What? No little cheap digital switcher? And you are trying to aim a, Radio Telescope at the Milky Way? Not at the sun? Where I'm sure you would pick up lots of stuff. And whatever micro-or millimeter region? It's a lot of hash. All across the spectrum.. And smoke gets in your eyes. Along with gas and dust and the sun. In your dish. In its broad daylight out. The atmosphere is completely ionized. What do you think you're going to pick up from the Milky Way? That's making it through this electromagnetic hash from the sun? And then to have the audacity. Not to show us your software in operation. And to simply be describing what it's not necessarily doing? But wanting you to think so? Because somebody wrote an app to do that. Like any other computer game. I'll have to see if some voltage coming from your dish. It doesn't know what it's looking at. Neither do you. As you need to do it during the day. So you can see what you're doing? And so you can make pretend you are a Radio Astronomer? It's a computer game for kids. To learn about the cosmos. From an online database. And depending on how much sun you are picking up? You could be the big winner this week! And you will receive an official Telescope from Edmonds Scientific. We have, Jay here. To tell you all about it. It's the new. 6 inch, folded mirror design. Of the JWST. Write in your own Edmonds Telescope! Wait till you see the Stars. Spring to life! Right before your Right Angle Mind. When you see Donnie Trump pass before your eyes. And not a moment too soon. Before November. I hope. We all hope. I want to see Donnie collapse from a cardiac arrest. While debating Joe Biden. That would be Awesome! RemyRAD

Hey that's really cool. You are really knowledgeable. You are good. Almost like a Broadcast Engineer Ham. And it looks like you have had plenty. Of tickling technical courses. For your fancy. Radio Telescope.. That is so Awesome! Does it also get, C-Band Satellite TV? I just love this! And were you the guy? That Broke-In, as Imitation Max Headroom years ago? I just knew it was you! We've caught you! No I don't work for the FCC. I just want your Autograph. And so you're looking for Hydrogen? You know we also make it on earth? Right? You don't have to go far. Not even 93 million. Sony can do it for less. No baloney. Even Toyota. If you're not certain about a Honda? But you meet the Nicest People on a, Honda. Jet. That looks really nice if you can afford one or two. The kind Joey O'Steen would get so he could Minister God on his, elaborate vacations. Around the world. In his own private Jesus Jet. Powered by Jesus. For, Jesus. With Jesus's's's official Emissary Joey O'Steen. In the, Image of Jesus. With a tie. And beautiful Teeth. With beautiful caps. His beautiful poor Social Security only existence, parishioners. All paid for. And also to keep mud off of his Jesus carpets. After about 17 of the 2015 Hurricane, survivors. Tracked some mud on his Jesus carpets. Forcing his poor parishioners. To pay $7 million to re-carpet the entire place! Because you cannot be getting mud on Jesus carpets. Jesus said no! Do not do that to me on the floor. Of the 20,000 seat former NBA, MAGA Stadium Church. As it is also Lakeside. Lakeside Manor.. Lakeside, terrain. Terrain! Terrain! Pull up! Pull up! Terrain! And pledgor dollars today. To his flag. Of the United Church of Merica. And to their Reap Public. For witch it stooded. One Nature on to another. I declare my Country, Merica! Who we! Ye ha! And the Kanye,, you came in on! Trumpy Wins Again! Before the elections! Woo hoo! RemyRAD

Thank you.

Thanks for such a clear succinct presentation. You have very good teaching and comms skills

Send to back in time sengal possible

I realized that by the time I finished this video, I traveled over 26 thousand kilometers. I've gotta take a nap. Thanks for the great info. I've been reading Garrett M. Graff's book, UFO, THE INSIDE STORY OF THE GOVERNMENT'S SEARCH FOR ALIEN LIFE. He frequently discusses the attempt to recieve extraterrestrial signals via the hydrogen line. Your videos have helped me better understand the concept. Thank you!

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Excellent video, thank for sharing the good quality information. I'm pretty new in radioastronomy, and I considered a very, very interesting branch. I have some questions too about building a homemade rediotelescope: what is the minimum size of the dish? (I like to build it using a parabolic antenna), and I have to use a SDR too to see on a computer monitor? (or a spectrum analiser is useful too??), and the last, if is good to use a low noise amplifier too ? Thanks for you help. Have nice day!

Great video, simplistic explanation & a good starting point for amateur radio astro. Keep going!

HA!... a SmartPi case! I just got one of those

Hey dude I’m watching your all videos in 2024 why did you have stop making those video ?

Good explanations - very clear! Thanks for sharing.

Terminal on the waveguide that measures the electric plane. How are the calculations? Is half the wavelength or any half multiple of it?

This is a great introductory video on this topic! Nice work 👍🏻

Cloudy night fun!

Brilliant video, hope you have a whole series of these planned, discovery's, findings etc...this is absolutely fascinating and expands on the normal visual astronomy were flooded with on TH-cam ❤

This is such a cool project! A definite standout

So much passion in this video

Can I just say your videos are incredibly underrated, I've been taking small dips into radio astronomy and found your video on the hydrogen line hugely helpful. Keep up the great work man!

Hi, What is the link to the first video you made in making the radio telescope? I clicked on your Photonic header but did not see the first radio telescope link. Thank you.

It there a way to cause the spin flip? Or do you need a magnet bigger than an MRI?

For those comments about sound card requirement, Back in the 80's and early to mid 90's, before USB and SDRs, the sound card was very important to and how data was collected for both radio astronomy and hams . Maybe that's what he was thinking of. The Atari 400 computer was popular back then for this purpose (more for SETI then Ham's) because of the quality and ease of programming of it's sound chip relative to system price and it's data recorder used ordinary audio tapes too! (Before hard drives were smaller than your desk drawer and affordable)

*Aracebo & FAST can receive signals in a cone extending outwards above them. "Directly above" might be under-selling them a little. They focus on one part of the dish to receive signals from a particular angle. Interestingly I learned from wikipedia that this makes FAST's "receiving area" only 300m across.

3:24 An SDR software defined radio receiver has nothing to do with the computer's sound card. The RF detection and audio processing is all done in software. The soundcard is only needed to play the audio the software has detected.

1:45 - Pyramidal horn antennas have gotten into dis-use not only by radio astronomers but also everywhere else in radio communication. Including radio amateurs. The reason is, although they are easy to design and build, the performance is rather poor for the amount of material used. Actually a cheap Wifi Yagi will beat the big horn shown here hands down. Even better is a small horn + old satellite dish. Probably a dish will allow to locate the milky way with good accuracy, givern its gain.

Exquisite nipples. Quite remarkable. 9.1/10

Watched

Here is an excellent resource of beginner level radio astronomy videos The videos are from members of SARA : Society of Amateur Radio Astronomy th-cam.com/play/PLCEbOD5_znsmOAz8fcIIF9JC-qogFntQN.html Regards, Alex KK4VB

The Virgo Software looks to be really worth a look.

This is absolutely fantastic

The LSR(K) data velocity correction factor varies continuously. It is dependent on the Observers Long/Lat Location on Earth / Date / Time / RA and Dec position of the telescope and can vary ~ +- 30 Km/Sec each day ( sinusoidal). Ideas for a small Neutral Hydrogen ( H1 ) Radio Telescope Project ( presented this Summer : Society of Amateur Radio Astronomers conference SARA ) th-cam.com/video/C6NCefVxNL8/w-d-xo.html