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Hi folks,
We’re going to start taking down “low effort “ posts/questions.
Based on community feedback, the overwhelming thought is questions easily answered by a search engine don’t belong here.
Example:
-Why is the Earth round?
-What is this bright, out of focus sky blob I took a crappy photo of?
-I have $xxx to spend on a telescope, which one do I buy?
Suggestions:
-If gravity pulls things into a sphere, why are some asteroids oblong?
-I tracked a satellite flying overhead east to west at 9:21 PM. Just north of Raleigh. Any idea how to figure out what it was?
-Which telescope is better for my budget ? Orion XT8, Skywatcher 8, or Zhumhell 8?
Thanks.
Nice and clear last night in Memphis, Tennessee. Seeing was a bit rough as my best view of Saturn was directly over my garage, which had been backing in 93 degree heat, all day. Pipp to get frames from 3 separate NightCap iphone videos, AutoStakkert to stack, and Registax to process. Top 20% of 2030 frames used. Not the greatest shot (still working to master wavelet processing), but fun to see that you can take decent pics with an iphone on a dobsonian.
Hi all, as the title suggests, I want to know what is the ACTUAL highest practical magnification for a telescope capable of 400x? I am aware that ‘seeing’ plays a major role in this and may not fully utilise the whole 400x. What’s the rule of thumb here? Is 300x a safe magnification to go with before it becomes blurry? I live in an area where ‘seeing’ is average Thanks all!
I live in Montreal. I named my daughter Ara after her grandmother, Barbara.
Thanks for your help.
The European Southern Observatory released this image of NGC 3981, a galaxy that is tidally disrupted due to an encounter with another galaxy. I made a video about it where I point out some interesting features of this image. Pump Heels Black Heel Chunky Beige Beige Round Polyurethane Women's ZHZNVX Fall PU Red Toe Basic Shoes wFwHxAYq
Hi all,
I'm writing a Dungeons & Dragons campaign, and my world has two moons which orbit the planet very slowly--one ~3x/year, the other ~5x.
Someone from this sub gave me a bunch of amazing resources & calculators which I used to cobble together an orbital calendar, so I now know which moons are in the sky at which times & where. However, I can't quite wrap my head around how this arrangement would affect phases.
In my head, the moons appear mostly stationary on any given night, moving a few degrees in any 24-hour period. At first I thought this would mean the phases change rapidly as the planet orbits the sun, but then I realized that our moon's phases change slowly, despite the sun being in different positions relative to it all the time.
Thong Taupe Sandal Qupid Flat Women’s My spatial reasoning isn't quite good enough to visualize a 3D system with multiple bodies orbiting & revolving simultaneously, so I've come to you for help. If I want my moons to move sedately through the sky over the course of days and weeks rather than hours, what would their phases look like? Can I still have month-scale phases, or would they shift as the sun moves?
Thanks :)
P.S. I'm currently using this calendar to track phases. (Go to "Save/Restore," then paste the code below into the box). It looks great, but I think it's using the orbital periods I put in, plus Luna-style phases. Feel free to play around with it!
{"year_len":376,"events":1,"n_months":11,"months":["Stormfront","Downpour","Breezes","Skyglow","Sisters","Mooncross","Latewind","Alerine","Eventide","Elune","Stillwater"],"month_len":{"Stormfront":36,"Downpour":36,"Breezes":40,"Skyglow":40,"Sisters":36,"Mooncross":10,"Latewind":36,"Alerine":36,"Eventide":36,"Elune":36,"Stillwater":34},"week_len":7,"weekdays":["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"],"n_moons":2,"moons":["Elu","Ale"],"lunar_cyc":{"Elu":125.333,"Ale":75.2},"lunar_shf":{"Elu":0,"Ale":0},"year":188,"first_day":0,"notes":{"188-6-7":"Mooncross","188-6-6":"Mooncross Festival","188-6-5":"Mooncross Festival","188-6-1":"Mooncross Festival","188-6-2":"Mooncross Festival","188-6-3":"Mooncross Festival","188-6-4":"Mooncross Festival"}}
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Everything to do with **Astronomy**: The amateur hobby of man since the dawn of time and scientific study of celestial objects.