-
I Made A $30 Tracker, Is It Any Good?
i just built this star tracker for about thirty dollars. It’s a very simple mechanism instead of using a motorized gear to track the stars like in a commercial star tracker this tracker makes me the motor and i manually track the sky by turning this threaded bolt and this counteracts the earth’s rotation stick around and i’ll explain how it works show you how to build one and then we will do a real world test of it by shooting several two-minute exposures of the milky way and the Rho Ophiuchi Cloud Complex which is beautiful with a basic DSLR and a 24 millimeter lens hello there my name is Nico Carver and my youtube channel nebula photos is all about helping people learn astrophotography i’m especially interested in how to approach astrophotography on a budget of course many aspects of astrophotography become easier if you just throw money at them and it’s easy to go down a gear buying rabbit hole i’ve been guilty of it myself but i also enjoy getting the most out of budget gear and budget techniques which is what i’m going to be showing you tonight with this i do have a patreon to support this channel and if you join the patreon you can also join my discord server which is a great place to ask questions and talk to others in the nebula photos community including me i’m going to say up front here i’m not super skilled in diy stuff but when i read about this star tracker that’s basically just two boards connected by a hinge with a ball head on top and then a threaded bolt that you turn uh to track i thought well this sounds simple enough that even i should be able to make one and and i did and it works and the inventor of this style tracker is george haig who released the idea for free and described how to make it in this april 1975 issue of sky and telescope magazine it’s called sometimes called a scotch mount because george haig is scottish and probably the most common name for it though is a barn door tracker and it’s been a popular diy project for amateur astronomers ever since he published this in 1975 and there have been many different versions of the design improvements to it maybe but i’m going to make the original hague design both to keep the cost low and because i’m fascinated by the simplicity of it before we jump into making one let me just very quickly explain how this kind of tracker works and it’s pretty easy in terms of the math so this isn’t going to take too long the reason the stars move from our vantage point is of course because the earth is rotating around its axis and the earth moves 360 degrees or one full rotation every 24 hours for the astrophotographer what this means is that if you just point your camera at the night sky and leave the shutter open for a long time the stars will trail meaning turn from little points to arced lines that we call star trails this of course also blurs out any deep sky object like a nebula or galaxy and one way to get around this which i’ve described in several other videos now is just to take very short exposures and then stacking many hundreds or thousands of these short exposures together with stacking software the name for this that’s sort of catching on is untracked astrophotography an untracked astro works well but it just has some definite limitations the main one being that you have to take hundreds and hundreds of photos and so that can wear out your mechanical shutter in the dslr and then it also just takes a long time to you know transfer all the files and stack them all together on your computer and another limitation is that it works really well for bright deep sky objects like orion and andromeda but not so well for dim ones so to solve this we usually turn to star trackers which just move at a constant rate that’s opposite the the earth’s rotation in the opposite direction and that lets us take much longer exposures with the camera with pinpoint stars so as i said earlier earth is rotating 360 degrees every 24 hours we can divide that down to 15 degrees per hour or 0.
-
IP Scholar Series: Martin Senftleben
Okay. Welcome, everyone. You are welcome to join us by turning on your cameras if you like, which we always like to encourage to create a little bit more of an actual seminar of people format.
00:20 - It’s especially useful to the speaker to present to a sea of faces rather than a sea of names.
00:26 - And it’s good to have you all. Jerry, it’s very good to see you.
-
🔴PDQ: The Lesser Known Features
Lex: Hey everybody, it’s Lex from PDQ. com, hey, we are covering lesser known features competing, deploying inventory lesser known, they’re there, they’re there for you to use, we just find people don’t know that they’re there. Let’s jump in.
00:13 - And Jordan, we’re going to start by talking about variables.
00:18 - Jordan: I mean, you got to start with the exciting things exciting.
00:21 - Lex: So basically get your coffee guys here it comes in variables, you can use them in deploy in inventory, there’s a couple of different ways to do these.
-
កូនខុសគន្លង - Wrong Path ភាគទី៩ (ភាគបញ្ចប់) - (Life Series Ep9-End) - [Sastra Film]
Hello, Mom! I’m busy right now. Nit! Don’t you come home? Your daughter wants to see you You should at least think about your daughter It’s been years and you had never come home I’m working to raise her but she missed you so much You should at least feel pity for your child I’m busy. If I’m free, I will visit her It’s okay. If you don’t have free time, I will go to visit you instead Drink, honey!
-
Being A Science Ambassador (Part One) - John Mark Kuhns - Anabaptist Perspectives Ep. 121
Well, hello again, and welcome to this episode of Anabaptist Perspectives. I’m here again with John Mark Kuhns at Faith Builders Christian School, and John Mark, I want to talk to you today about science, and being Christians and science and scientists, and a lot of people don’t think those two things go together, so I want to talk to you about that today, but before we do that can you just give us a little bit of your background with science?
-
Satanic Power Pulling on People while the World is Collapsing
“Bismillahir Rahmanir Raheem. Atiullaha wa atiur Rasula wa Ulil amre minkum. ” And always a reminder for myself ana abdukal ‘ajeezu, dayeeuf, miskinu, wa zhalim, wa jahl, and but for the Grace of Allah (AJ) that we are still in existence, alhamdulillah.
00:30 - That always a was a reminder for myself that when they describe that Allah (AJ) describing for guidance ‘Whom are guided are truly guided’ and the understanding of spiritual guidance and its immense reality, that whatever course they have us on is a curriculum and this curriculum has nothing in it that is wasteful unnecessary nor anything random, everything is a precise medicine.
-
March 18, 2021 WY Conditions & Outlooks Presentation
I’m Tony Bergantino. I’m the acting director of the Wyoming State Climate Office and the Water Resources Data System. And I’d also like to welcome you to our Wyoming Conditions and Outlooks presentation, which is brought to you by my office State Climate Office, the National Weather Service in the Missouri River Basin Forecast Center, the University of Wyoming Extension and USDA Northern Plains Climate Hub, the Tribal Engineers Office of the Shoshone and Arapaho tribes, the US Geological Survey, and the Natural Resources Conservation Service.
-
Reopening Schools: A Seminar for State and Local Leaders
- Welcome everyone to our third policy practice seminar for state and local COVID responders.
00:16 - This one on reopening schools. I’m Doctor Margaret Bourdeaux, the research director for the program in global public policy at Harvard Medical School.
00:25 - And co-chair of the Berkman Klein Centers’ digital pandemic response working group.
00:30 - The purpose of these seminars is to delve into COVID response issues that really sit at the intersection of policy, science and delivery.
-
#5 - Generation ALPHA
i’m glad alpha didn’t haze me i’m just saying you know i’m not with that i would have been like nope sorry because i was done wait for an interview for example i’ve worked both in the advertising industry and in the corporate space in the advertising industry i could show up with jeans and a t-shirt and still get the job okay as a creative you can show up like that as long as you’re three two one welcome back to the sandbar with your friendly neighborhood mc sandy paulino and you might recognize a familiar face joining us today jennifer paulino and we also have with us our good friend kayla quesada how are you doing kayla good how are you good good good so kayla’s joining us for our conversation about community it’s been a topic that we’ve wanted to hit for a little bit and we thought it’d be a good opportunity to get that started so um kayla you told me you work at a hospital right yes what is that what’s what’s going on there so i am an office coordinator that’s my title i you can think of it as like receptionist work okay i’m mostly like over the phone i do like orders and stuff and it’s particularly concentrated on cancer patients so that’s been my thing for the past like year and a half and you was you were there during like the pandemic and stuff yeah how was that was it popping off in there it was definitely intense um i don’t see patients in person but i’m my job needed me to be on site so having to go remote was a lot for everyone and it was just kind of overwhelming but yeah we had to figure it out so kayla’s also an alumna of omega phi beta and i’m not really into fraternities or sororities or any of that so you you’re gonna have to you know break it down and for somebody that doesn’t know yeah so yeah what’s that what’s what what are y’all how do y’all operate so we are a greek letter organization and the philanthropy is raising awareness of violence against women um i’ll see y’all because we all know in this world it’s very necessary yeah yeah so we focus on women empowerment and one of the things that we do focus on is domestic violence and community and women and like i said women empowerment and just having that community within each other because sometimes it’s really hard to find that outside and i was lucky enough to find that community in my school and and translate it outside after i graduated too okay so i thought that was really dope for me yeah all right and um jennifer you’re actually in a similar situation i wouldn’t say so it’s not really a greek letter organization but it’s definitely that community type of situation where you have people coming together to fulfill a purpose to create a safe space for people and to create opportunities which is alpha right i’m i’m a little i’m a little new but i know i know my my alpha knowledge so jennifer tell tell us tell the people what do you do you know what is alpha to you so i started with alpha um back in 2013.
-
House Proceedings - Statement on Indulgence by the Chief Opposition Whip
Just, if I could just encourage members if they are able to stay just for a second, I’m going to give the call to the Chief Opposition Whip and Member for Fowler.
00:11 - Thank you, Speaker, I simply want to advise the House that I will not be contesting the next election—and I do point out that Bernadette’s sitting up there to make sure I don’t recant on this decision!