astrophotography – Arcs in stacked star field

The length of the arcs (compared to the very short trailing of the actual star images over each 30 second exposure) suggests that these are trails of actual moving objects.

Welcome to the Starlink era. While your phone isn’t (yet) set up to use the Starlink network for communication, it appears it’s well capable of detecting the satellites by their reflected light.

I can’t be certain these are Starlink birds, of course — but they’re very numerous, in low enough orbits to move significantly in 30 seconds, and even the newer, “darker” ones reflect enough light to make them comparable in brightness to dimmer stars.

This kind of thing is why some astronomers have been complaining (since the second or third Starlink launch) that this network and its competitor(s) would be the end of ground-based astronomy, even as we approach the ability to build telescopes (or telescope networks) capable of resolving surface features on exoplanets.

astrophotography – Strikes in staked star field

Stacking by Sequator 100 dng photos of night sky taken with a smartphone resulted in a (beautiful, I would say) populated star field where undesired arc strikes are seen all over the field.
It is like as the program treated the vast majority of stars as wanted, while (perhaps the less brighter) others are just rendered as they moved along the 100 frames period.

Align stars was chosen then accumulation.

Is this a common problem using Sequator, or at least happened to some of you? Is there any trivial setting or way to redo the stacking?
Thanks.

Attached is a compressed copy of the final photo. enter image description here

Celebrate May Fourth with the RackNerd Star Wars Giveaway!

Noted community provider RackNerd contacted us to offer our readers a fabulous set of Star Wars-themed prizes to celebrate Star Wars Day!  May the Fourth be with you!

The LowEndBox community continues to grow and we appreciate you being part of our journey!  You, our awesome readers, are the reason we work hard to produce content, partner with providers to advertise awesome deals, and spend hours every week making sure LEB is a place you want to keep returning to.  Your patronage is what keeps LEB working.

To say thank you for being part of our community, we invite you to enjoy our Star Wars giveaway!

No Purchase Necessary. RackNerd, a provider that is well known around LowEndBox and LowEndTalk is sponsoring this giveaway, exclusive for the LowEndBox community! Be sure to check out RackNerd’s latest LEB offers by clicking HERE. Stay tuned for more giveaways by other sponsors in the near future!

No purchase is necessary, and all you have to do is enter your e-mail address below to enter the giveaway. Once you’ve entered the giveaway be sure to comment that you’ve entered the giveaway so that we know you did 🙂

How will the winner be selected?

All you have to do is sign up for the LowEndBox mailing list below:

A winner from the mailing list will be randomly selected by LEB/LET administrator raindog308 using random.org for each giveaway item. If the winner does not respond to the e-mail within 72 hours the entry will be forfeited and another random winner from the list will be selected.

The winner will be announced on May 31, 2021. Be sure to enter in your email above before then to have a chance to win!

 Additional Terms / Information:

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Any LEB advertisers who wish to sponsor a giveaway event please be sure to contact us via our helpdesk.

raindog308

I’m Andrew, techno polymath and long-time LowEndTalk community Moderator. My technical interests include all things Unix, perl, python, shell scripting, and relational database systems. I enjoy writing technical articles here on LowEndBox to help people get more out of their VPSes.

Star Wars Day

For all like me who are a big fan……..

May the 4th be with you!

Adult star bio website and sex toys reviews

How is it monetized?
affiliate.
$45 last month

Does this site come with any social media accounts?

How much time does this site take to run?
2 hours per month

Has no time for this website.

Site is well indexed

What causes the multiple instances of the same object (star or planet) that appears on this photo?

On a photo I took, there seems to be multiple instances of the same object, is it a result of my low quality camera and lens, or something else?a

ISO: 3200
3s

Selling – Homr Of Star Wars

I’m selling because I own 4 other domains and websites, that need attention.

Please note: Revenue Per Month is only $24 because the website is just created!
SEMrush

Verified statistics for 2 months old Star Wars DropShip website is now for sale:

· Traffic 1,908

· Backlinks 411

· Referring domains 84

· USA Pageviews 1,149

896 high ranking Star Wars and 2,079 other Warehouse products

More info:

Please notice: Domain was registered May 14, 2017, but the old design version and backup were damaged in late 2020, so on January 31, 2021, I paid https://alidropship.com/premium-dropshipping-stores $254.15 to re-design and re-create the whole website, and to import 50 Star Wars products.

The Alidropship Team finished the paid setup on February 15, 2021, and after that, I have only worked with adding 856 Star Wars products, and 2,079 other Warehouse products.

Adding these products was very time-consuming because I only focussed on adding high ranking products listed on https://sale.aliexpress.com/__pc/rankings_list.html

And after searching for each of these 11 categories on https://www.aliexpress.com/all-wholesale-products.html, I needed to do all these tasks for each product imported:

 

plotting – Getting error while introducing star symbol

I am interested in creating a star symbol in Mathematica. But I am getting some error saying Nonatomic expression expected at position 1 in First. How to over come this error. I am using Mathematica 12.2 version in ubuntu 18.

star = First[
  First[ImportString[
    ExportString[Style["✶", FontSize -> 16], "PDF"], 
    "PDF", "TextMode" -> "Outlines"]]]
emptyhex = 
 Graphics[{EdgeForm[{Thickness[.1], Black}], White, star}, 
  ImageSize -> 30]
filledhex = Graphics[{EdgeForm[], Black, star}, ImageSize -> 30]

automata – Star notation for context-free language alphabet?

It is equivalent (usually, otherwise it would be explicitly stated).

The “star-operation” is called a Kleene-star, and it is an operation that basically takes the set and creats the set of all combinations of items from the original set. In the example of ${0,1}$, we would have that ${0,1}^*={0^{k_1}1^{k_2}0^{k_3}dotsmid k_1,k_2,dotsin mathbb{N}}$, and intuitively speaking, this is the set of all words created from the alphabet ${0,1}$. This obviously is also true for any other alphabet $Sigma$ you wod want.

dnd 5e – Is the star chart a material component for the Guidance and Guiding Bolt spells from the Circle of Stars druid’s Star Map feature?

It must be held in hand, but it is unclear if it counts as a material component.

The feature description is clear that you must be holding the star chart:

While holding this map:

But, this does not necessarily make it a material component. The Artificer’s spellcasting feature explicitly tells us that all Artificer spells have a material component:

You produce your artificer spell effects through your tools. You must have a spellcasting focus—specifically thieves’ tools or some kind of artisan’s tool—in hand when you cast any spell with this Spellcasting feature (meaning the spell has an ‘M’ component when you cast it).

It is unclear if this applies uniquely to the Artificer, or if the same logic applies to the Stars druid as well. This rule for the Artificer seems to set up a definition that may be applicable elsewhere. That is, that a requirement to hold something in hand to cast the spell means the spell has a material requirement.

It’s up to the DM.