Lmst

Photonic Lightsails are our Best Shot at Reaching Another Star

https://fed.brid.gy/r/https://www.universetoday.com/171137/photonic-lightsails-are-our-best-shot-at-reaching-another-star/

<p>Chemical rockets are loud, noisy and can only get us so far. If we want to reach another star system, we’ll need something better—either super energy-dense fuel to improve the efficiency of chemical rockets or a way to push spacecraft using beams of energy, like a photonic lightsail. A new paper looks at the pros and cons of lightsails, figures out the best setup to carry a small payload to another star while humans are still alive to see it, and checks out what materials might actually work for this kind of mission.</p>

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<p><br />Interstellar travel, or journeying between stars, represents one of our most ambitious challenges. While current technology limits us to exploring the solar system, the dream of reaching distant star systems drives scientific innovation and imagination. Such journeys would require advanced propulsion systems, like nuclear fusion engines, solar sails, or theoretical concepts such as warp drives and wormholes (must resist any reference to Star Trek.) The immense distances between the stars present enormous challenges in terms of time, energy, and resource management. Shielding from radiation, life support and the psychological effects of isolation are among the challenges yet still, the pursuit of interstellar travel continues to inspire.</p>

<figure class="wp-block-image size-full"><img alt="" class="wp-image-164660" height="1024" src="https://www.universetoday.com/wp-content/uploads/2023/12/11375.jpg"

While #lightsail did more of the work, and made it fairly easy, #digitalocean left me feeling are more in control. Glad I made the switch. #blogging

Measuring Lightsail Performance in the Lab

https://fed.brid.gy/r/https://www.universetoday.com/170730/measuring-lightsail-performance-in-the-lab/

<p>Sailing has been a mainstay of human history for millennia, so it’s no surprise that scientists would apply it to traveling in space. Solar sailing, the most common version, uses pressure from the Sun to push spacecraft with giant sails outward in the solar system. However, there is a more technologically advanced version that several groups think might offer us the best shot at getting to Alpha Centauri – light sailing. Instead of relying on light from the Sun, this technique uses a laser to push an extraordinarily light spacecraft up to speeds never before achieved by anything humans have built. One such project is supported by the Breakthrough Starshot Initiative, initially founded by Yuri Milner and Stephen Hawking. A new paper by researchers at Caltech, funded by the Initiative, explores how to test what force a laser would have on a light sail as it travels to another star.</p>

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<p>The general concept of pushing something with light seems simple enough, but the devil is in the details in terms of how it will operate in space. The laser and spacecraft have to synchronize over millions of miles. If either so much as slightly move the angle they are set to, perhaps because a micrometeoroid hit them, then the mission fails either because the craft ends up in a different part of the galaxy or the laser doesn’t provide enough power to get it there in a reasonable amount of time.</p>

<p>Testing is the way to ensure su

Anyone running #drupal on #aws #lightsail here? I want to install a module, but the composer commands I run don't seem to work. Is there something different about how these systems are installed vs others?

Lightsail環境でVPCピアリングを使ってALBに接続する
https://qiita.com/okaokayaaa_n/items/6362059a3b5faec4726b?utm_campaign=popular_items&utm_medium=feed&utm_source=popular_items

#qiita #AWS #ALB #Lightsail

Well this is driving me mildly crazy. My created-from-scratch Lightsail Wordpress instance keeps redirecting to the old Wordpress.com site. Unless I'm in a private browser window. Then it works. I've cleared caches, web history, etc. in safari but no luck. #wordpress #lightsail

#Lightsail 트래픽 제한을 하려면 직접 #cron‑으로 스크립트를 돌려야 하는구나…

Alternative Cloud9としてのLightsail for Research + CloudShell
https://qiita.com/watany/items/e87c03ed520199cd0489?utm_campaign=popular_items&utm_medium=feed&utm_source=popular_items

#qiita #AWS #cloud9 #WebIDE #CloudShell #Lightsail

What Happened to the $100 Million Dream to Send Sub-Gram-Sized Cameras to Alpha Centauri https://petapixel.com/2024/07/22/what-happened-to-the-100-million-dream-to-send-sub-gram-sized-cameras-to-alpha-centauri/ #breakthroughstarshot #Technology #technology #lightsail #solarsail #science #Space #space #News

I run this blog on a small Amazon Lightsail instance (1 GB RAM, 2 vCPU). Cheap!

Most of the time, it’s fine, but it has a bad habit of dying sometimes on a large image upload. The Jetpack app reports the upload as failing (offering to try again) but my site is completely unresponsive. I can resolve this in one of two ways: either I can still SSH into the box, and restarting PHP with sudo systemctl restart php-fpm recovers and I can try the upload again; or the instance isn’t responsive to SSH and I have to reboot it via the Lightsail console. The CPU utilization is elevated during this period, eating into the burstable zone.

I have seen generally better performance since I updated /etc/php-fpm.d/www.conf to override pm = static and pm.max_children = 2, but something was obviously still wrong. I installed atop since I often couldn’t get on the host to see what was happening right when it was stuck.

Last week, while working on a new post, my instance got wedged in the same way while trying to upload a short video. From the JetPack activity log I could see it became unresponsive at 11:42 PM Seattle time; the instance and atop use UTC so I’d need to look at the minutes leading up to to 0642 in the weekly atop log. That looks like this:

Well there’s my problem! php-fpm spikes in CPU, and then kswapd0 pegs the CPU while the instance’s local disk goes wild with reads trying to keep up. One odd thing is while the memory is low, it doesn’t seem to have changed much for the two php-fpm children. I guess I either need to tune the swappiness on my host or try to put a better clamp on PHP processing images? Need to investigate further.

I’m sure the real solution is to not host my own LAMP stack, but where’s the fun in that?

https://blog.ultranurd.net/2024/07/21/investigating-failed-wordpress-uploads/

#amazonLinux2023 #apache #aws #debugging #httpd #lightsail #linux #phpFpm #wordpress

AWSのLightsailでスモールサービスを立ち上げる
https://qiita.com/Taichi-yzrh/items/1efb74838b03a57189b8?utm_campaign=popular_items&utm_medium=feed&utm_source=popular_items

#qiita #AWS #vps #Terraform #Lightsail

TIL: #AWS #Lightsail charges occur also for stopped instances.
#WTF

Google Colab + LightGBM (GPU) で遭遇したエラーと解決策
https://qiita.com/tetsuro731/items/9ae0a920cbb3c62f20f5?utm_campaign=popular_items&utm_medium=feed&utm_source=popular_items

#qiita #OpenCL #GPU #機械学習 #Lightsail #GoogleColaboratory

How Could Laser-Driven Lightsails Remain Stable? https://www.universetoday.com/165577/how-could-laser-driven-lightsails-remain-stable/ #breakthroughinitiatives #spaceflight #lightsail

"Starting on May 1, 2024, all new and existing [AWS] Lightsail instances that include a public IPv4 address will be subject to our revised pricing. IPv6-only instances are now available for workloads that do not require a public IPv4 address." #AWS #LightSail #IPv6

Just tried out #lightsail for research. It has IPv6 support by default. 🤩

#aws

Updated AWS::Lightsail::Container PrivateRegistryAccess

Use the PrivateRegistryAccess property to describe the configuration for a Lightsail container service to access private container image repositories, such as Amazon Elastic Container Registry (Amazon ECR) private repositories.
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-lightsail-container-privateregistryaccess.html #lightsail #cloudformation

Updated AWS::Lightsail::Disk Location

Use the location property to specify the location of the disk, such as the AWS Region and Availability Zone.
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-lightsail-disk-location.html #lightsail #cloudformation

I'm excited this is finally happening !

However 🧐

Two things I'm not as excited about as a layperson reading this article :

(1) They're planning to use lots of fuel to get the device off the planet - can't they just shoot it into space?

(2) Aerocapture for entering orbit sounds sketchy how it's described, though it sounds like the best way of slowing the craft once it reaches #Mars is still being researched.

#spaceexploration #lightsail #armchaircritic

https://phys.org/news/2023-09-solar-mars-days.html

setting up a #lightsail box for the first time

Lightsail creates a default key pair in each #AWS Region where you create an instance. Choose Download to download the default private key if you also want to connect to your Lightsail instance using an SSH client

download the private key is the default sorry what

#Lightsail

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