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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.
MTN Hibiscus W GTX Malta SPEED 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.