Astronomers Capture Highest-Resolution Image Ever Taken of the Sun's Surface

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Astronomers have produced the highest-resolution image of the Sun's surface ever recorded, according to a report by Physics World. The achievement marks a significant milestone in solar observation and imaging technology. The detailed imagery is expected to offer scientists an unprecedented close-up view of solar surface features and activity. Such high-resolution observations can help researchers better understand solar phenomena that influence space weather and Earth's environment.

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Tutorial: Build an Encrypted Command-Line Password Manager in Python

A new developer tutorial on DEV Community walks through building a custom command-line password manager using Python 3.11 and the cryptography library. The project uses Fernet symmetric encryption to ensure stored credentials remain confidential and tamper-evident, even if the underlying file is stolen. Developers are guided through creating a PasswordManager class with methods for key generation, adding passwords, and retrieving them via decryption. The tutorial also integrates pyperclip to automatically copy retrieved passwords to the clipboard for everyday convenience. The guide targets developers who want full control over their credential storage without relying on browser-based or plaintext solutions.

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ProgrammingHacker News ·

GitHub Actions hit by one of its longest major outages on record

GitHub Actions experienced a significant service outage that ranks as the second-longest major disruption in the platform's history. The incident was tracked and reported via GitHub's official status page. The outage affected users relying on GitHub Actions for automated workflows and CI/CD pipelines. Details about the root cause and total duration were documented on the GitHub status dashboard. The event drew attention from the developer community, sparking discussion on Hacker News.

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ProgrammingDEV Community ·

HazelCast Offers Java Teams an In-Memory Distributed Computing Platform

HazelCast is an open-source, in-memory data grid and distributed computing platform written in Java, designed to simplify state management across clustered applications. It stores data in memory across multiple nodes, enabling sub-millisecond data access while providing automatic replication and failover capabilities. The platform offers distributed data structures such as maps, queues, locks, and topics, all synchronized across nodes in real time without manual coordination. HazelCast can run either as an embedded library within a Spring Boot application or as a standalone server cluster, with native Kubernetes support. It is particularly suited for Java-based microservice teams tackling challenges like session storage, distributed locking, rate limiting, and live configuration management, though its reliance on heap memory and complexity around network partitions require careful planning.

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ProgrammingDEV Community ·

Playwright Trace Viewer Lets Developers Debug CI Test Failures Without Reproducing Them

Playwright's built-in Trace Viewer records a full, replayable snapshot of every test run, capturing DOM states, network calls, console logs, and browser actions in a single trace.zip file. Traditionally, debugging a CI test failure requires pulling the branch, attempting local reproduction, and adding instrumentation — a loop that can consume hours when failures are environment-dependent. With Trace Viewer enabled, developers can open the recorded trace file locally or directly from CI artifacts instead of recreating failure conditions. On CI pipelines, the recommended configuration sets tracing to trigger only on a test's first retry, avoiding unnecessary storage overhead on passing runs. The tool effectively provides a free API debugging layer alongside UI test recordings, reducing the time and cost associated with flaky or environment-specific test failures.

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