buranarchive.space

SpaceEngine is a realistic virtual universe simulator you run on your computer. It is built for people who want to travel through a scientifically grounded cosmos rather than a scripted game world: you can move from star to star and galaxy to galaxy, land on planets, moons, or asteroids, and change the speed of time to watch celestial events unfold. The simulation is seamless across a volume billions of light-years wide and contains trillions of planetary systems, according to the official site. It is the right tool if your interest is exploration and observation; it is not a mission-based game with objectives or a scoring loop.

What SpaceEngine actually is

The core idea is a procedural universe grounded in real scientific knowledge. Rather than hand-building every world, SpaceEngine generates planets, stars, and galaxies using rules derived from how modern science thinks the universe is structured. That is what lets the simulation reach a scale no manually authored universe could match, while still depicting objects in a way consistent with current understanding.

Alongside the generated content, real celestial objects are present if you want to visit them. The site specifically lists:

• The planets and moons of our Solar System
• Thousands of nearby stars with newly discovered exoplanets
• Thousands of galaxies that are currently known

So you get two layers in one program: a vast procedural backdrop and a catalog of actual astronomical objects you can go look at directly.

What you can do in it

The interactions described on the official site are the practical answer to "what can you explore":

• Travel at cosmic scale — move from star to star and from galaxy to galaxy.
• Land and explore surfaces — touch down on any planet, moon, or asteroid and examine its alien landscape.
• Control time — alter the speed of time and observe whatever celestial phenomena you choose.
• Move seamlessly — all transitions are described as completely seamless, so there are no loading breaks between leaving orbit and standing on a surface.

That combination is what separates it from a planetarium-style sky viewer: the emphasis is on going there, not just looking up.

How procedural generation shapes what you see

The procedural generation is the mechanism behind the scale. Because worlds are produced from scientific rules instead of being individually designed, the simulator can populate trillions of planetary systems and still present each one as a coherent place with its own landscape. The site frames this as depicting the universe "the way it is thought to be by modern science" — meaning the generated content is an informed extrapolation, not a random fantasy generator.

A useful way to think about it: when you fly to a star that no catalog lists, what you find there was computed from the same physical principles used everywhere else in the simulation, which is why the result stays consistent as you keep traveling.

Getting started

The path from interest to actually exploring is short:

1. Download SpaceEngine from the official site (spaceengine.org), which provides a Download entry point.
2. Read the Universe manual and FAQ for how the simulation is organized and how to navigate it.
3. Work through the Flight School to learn movement and controls in a guided way.
4. Optionally go further with the addon documentation, which covers creating a star, creating a planet, planet textures, planet biome presets, creating a DSO (deep-sky object), creating a ship, and scenario scripts.

The addon and creation material matters if you want to move from exploring to building — it is the documented route to adding your own objects and scenarios rather than only visiting what already exists.

Practical notes before you commit

• SpaceEngine is desktop software, not a browser toy; the site describes it as something you explore "on your computer."
• The official site references Steam and a Buy option in its page metadata, so distribution and purchase run through established channels — check the current listing for price and platform details rather than assuming.
• The project is actively maintained: the news section shows updates such as version 0.991.50.2155 covering ship material settings, catalog updates, and a star browser fix, with public beta builds preceding live releases. If you follow development, expect catalog and feature changes over time.

If your goal is to wander a scientifically motivated cosmos, land on unfamiliar worlds, and bend time to watch them move, SpaceEngine is built for exactly that. Start with the download, then let the manual and Flight School teach you the controls before you go far.

HEASARC (NASA's High Energy Astrophysics Science Archive Research Center) is the primary multi-mission archive for extreme ultraviolet (EUV), X-ray, and gamma-ray astronomy data, and it also covers cosmic microwave background (CMB) datasets through its LAMBDA center. You can search it through the Archive Quick Search or the Xamin portal, retrieve results via the web portal, the Xamin API, astroquery, or Virtual Observatory protocols, and analyze data directly in the cloud on SciServer or the Fornax Initiative. This guide covers the search workflow, the access routes, and the software you need to go from a query to a usable dataset.

What HEASARC Actually Holds

Before searching, it helps to know what you are searching across. HEASARC is NASA's designated multi-mission archive for cosmic astronomy datasets in the EUV, X-ray, and gamma-ray wave bands, plus CMB datasets. LAMBDA is the associated NASA center of expertise for CMB research, providing archive data from cosmology missions and software tools.

The archive spans many active and past missions, including:

• X-ray and EUV: Chandra, XMM-Newton, ROSAT, Swift, NICER, NuSTAR, IXPE, Einstein Probe, XRISM, XPoSat, MAXI, SRG eRosita / ART-XC
• Gamma-ray and high-energy: Fermi, CALET, DAMPE, AMS-02, GECAM, GRBBeta, HXMT-Insight
• Other: AstroSat, SVOM, TESS, BlackCAT

Because the archive is multi-mission, a single query can return observations of the same object from several instruments, which is often what you want when comparing coverage across wave bands.

Searching with Archive Quick Search

The Archive Quick Search is the fastest entry point. It queries the HEASARC database directly and redirects you to the search portal once the query runs.

The query syntax combines a target or table name with conditions. The site's own examples show the pattern:

The logic: name the object or table, then add constraints such as exposure>10000 or status='archived'. Multi-table queries (as in the Messier example) let you join conditions across tables using aliases like a. and b..

Expected result: the query runs against the HEASARC database and you are redirected to the search portal with matching rows. If a query returns nothing, the usual causes are a misspelled object name, a constraint that is too tight (for example an exposure threshold above what any observation reaches), or a table name that does not exist in the archive.

Using Xamin for Deeper Exploration

Xamin is the interactive web portal for data discovery and exploration. The classic Browse portal remains available if you prefer the older interface. Xamin is the better choice when you want to filter interactively rather than write a query string, and it is also the backend behind the API access routes described below.

Four Ways to Retrieve Data

HEASARC offers several access routes, and the right one depends on whether you are working interactively or scripting a pipeline.

1. Web portal (Xamin or classic Browse) — best for one-off exploration and visual inspection of results.
2. Xamin API — best for scripted or repeated queries where you want machine-readable output.
3. astroquery Heasarc module — best if you already work in Python and want to query HEASARC from a notebook.
4. Virtual Observatory protocols via pyvo — best if you need interoperability with other VO-compatible archives and tools.

All four reach the same underlying archive, so the choice is about your workflow, not about data coverage.

Analyzing Data in the Cloud

You do not have to download data to work with it. HEASARC@SciServer is an analysis-ready platform where both data and software are available through the browser. HEASARC is also part of the NASA Fornax Initiative, which is building NASA's next-generation cloud-based science platform; the Fornax Initiative is currently welcoming interested beta users, and you can analyze HEASARC, IRSA, and MAST data in the cloud there.

This matters because high-energy analysis often requires large calibration files and mission-specific software. Running in the cloud avoids installing and maintaining that stack locally.

Software for High-Energy Data

For local analysis, HEASoft is the core package. HEASoft 6.37.0 is available, and HEASoft and XSPEC are distributed as conda packages. On SciServer, HEASoft and other high-energy software — including CAIO, XMM-SAS, Fermitools, and Spex — are already installed and available.

One version note worth checking before you start: NuSTARDAS v2.1.6 is required for recent NuSTAR observations. Analyzing any observations taken on or after September 24, 2026 requires NuSTARDAS v2.1.6 in the latest HEASoft v6.37.1 release. The general analysis process itself is unchanged — only the calibration software version requirement differs.

A Practical Starting Sequence

If you are new to the archive, this order avoids most dead ends:

1. Identify your target and which mission likely observed it.
2. Run an Archive Quick Search with the object name plus a mission or table name.
3. If you get too many or too few rows, add or relax a constraint such as exposure or status.
4. Move to Xamin if you need interactive filtering.
5. Choose an access route — portal, API, astroquery, or pyvo — based on whether you are exploring or scripting.
6. Decide whether to analyze locally with HEASoft/XSPEC or in the cloud on SciServer or Fornax.
7. Check the required software version for your mission before reducing data.

The archive is free to use for scientists and astronomy enthusiasts, and it provides archival data, multi-mission software and analysis tools, and information about current and past observatory missions.

Horizon is a file hosting service for uploading and sharing photos, videos, documents, links, and clipboard content. It fits anyone who needs a fast, private way to send large media or embed files on a website or social platform. You sign up, upload through the web or a desktop tool, then share the generated link or embed code. Privacy is handled through optional at-rest AES encryption you toggle on, and sharing works across Mac, Linux, Windows, iOS, and the web.

What you can upload and share

Horizon is built around media and document sharing rather than a single file type. According to the site, you can upload and share:

• Photos — including formats like JPEG (the site shows an example named IMG_1137.jpeg)
• Videos — including .mov and .mp4 files, with streaming-optimized playback
• Documents — such as PDFs (examples include Event Agenda 2024.pdf and client-info.pdf)
• Links — you can create shortened links to your site
• Clipboards — clipboard sharing is supported, and on Mac and Linux the desktop app simplifies screen capture and clipboard sharing

The service describes itself as "the home for all your files, small or large," so it isn't limited to images. If your main goal is photos, the same upload-and-share flow applies.

How the sharing flow works

The core loop is: upload → get a link or embed → share it. The homepage shows a shared link in the form https://i.horizon.pics/... alongside an uploaded video, which is the kind of URL you'd paste into a chat or post.

1. Sign up and start uploading. The site's call to action is "Sign up and start uploading for free." Note that the page does not list pricing details or payment options, so treat any cost or account limits as unconfirmed by the source material.
2. Upload your file. You can do this through the web, or through a desktop integration depending on your OS (see the platform section below).
3. Share the result. Horizon generates a link you can send directly, or embed code you can place on a site. It also supports shortened links to your site.

Embedding on websites and social platforms

Horizon lets you customize how uploaded files appear and share them across platforms like Discord, X, and Telegram. For websites, the site says you can embed images, videos, and audio "with just a few clicks and a line of code." It also offers a content delivery network (CDN) so you can offload delivery to Horizon's infrastructure and optimize site performance.

If you're sharing to a social platform, the embed customization is what makes your content "catch the eye" rather than appear as a plain link.

Privacy and encryption

Horizon's privacy model centers on at-rest encryption. The site states that files remain private and secure with advanced at-rest encryption, and that activating AES encryption is "as simple as flipping a switch." That means encryption is an option you turn on per your needs, adding a layer of security on top of the default hosting.

Two practical points from this:

• Encryption protects stored files; it's described as at-rest, not as end-to-end messaging encryption.
• Because it's a toggle, you decide which uploads need the extra protection.

The service also emphasizes shortened links, which keep shared URLs tidy and can avoid exposing long file paths.

Using Horizon across devices

Horizon integrates with several platforms, and the right setup depends on your operating system:

If you mainly share photos from a phone, the Dropshare route covers Apple devices. If you're on Windows and want quick screenshot-to-link workflows, ShareX is the documented path. For Mac and Linux users who capture screens or share clipboards often, the custom desktop app is the intended tool.

Video streaming and organization

Two features matter if you share video or accumulate files:

• Streaming-ready playback. Horizon says it's optimized for seamless video playback, so videos load quickly and play smoothly whether you're sharing with a small audience or streaming to a large group. The claim is buffer-free, high-quality streaming.
• Organized sharing. The site lists "Organized sharing" as a core feature area, positioning Horizon as a place to keep shared files managed rather than scattered.

Quick decision guide

• Choose Horizon if you want one place to upload photos, videos, docs, links, and clipboard content, share them via links or embeds, and optionally turn on AES encryption for stored files.
• Pay attention to the platform match — Apple users get Dropshare, Windows users get ShareX, and Mac/Linux users get the custom desktop app for capture and clipboard work.
• Check pricing and account limits yourself. The source page does not state prices or payment platforms, so don't assume the free signup covers every use case or file size.

An art gallery is a space — physical or online — where paintings, drawings, prints and other works of art are displayed, and often sold. It differs from a museum mainly in purpose: museums hold permanent collections for public education and preservation, while galleries usually present works that are available to buy. Studio 18, based in Jersey in the Channel Islands, describes itself as "Jersey's premier Art Gallery, supplying 'Works of Art' for over 40 years," and its online shop shows how a commercial gallery typically organises what it offers.

Gallery vs museum: the practical difference

Public galleries sit between the two: they exhibit art for viewing rather than sale, but without a museum's long-term collection mandate. If you are unsure which you are walking into, look for price labels or an enquiry desk — that is the quickest signal.

What galleries actually show

The range is wider than most first-time visitors expect. On Studio 18's site, the categories alone give a good picture of a working gallery's mix:

• Paintings and drawings — original, one-off works by named artists.
• Limited edition prints — for example Derek Crow's Harbour Series I, II and III, listed at £60 each and described as limited edition prints.
• Posters — such as Matt Hancock's animal eye test poster at £15 and the large A-Z poster at £20.
• Prints by well-known names — Chris Orr RA's Animal A-Z poster print at £38.
• Themed or humorous work — Boris O Klein's Dirty Dogs of Paris series, with titles like Chacun Son Tour and Comme Nos Maitres, each at £50.

Galleries also organise by artist, style or subject. Studio 18 groups its artists under headings including Jersey Artist, In Gallery, Contemporary, Modern/Abstract, Urban Art, and Children's prints and Posters — a structure that lets you browse by who made the work or by the kind of work you want.

How to browse a gallery, in person or online

1. Decide what you are looking for. A gift, a first original, or a specific artist? This narrows the field fast.
2. Filter by artist or category. Online, use the menu groupings (artist name, style, subject). In person, ask staff which wall or room covers your interest.
3. Check the essentials on each label or listing: artist, title, medium, whether it is an original or a print, edition size if limited, dimensions, and price.
4. Note the price basis. Studio 18's listings show prices in GBP with a currency switcher for Dollar and Euro, and cart totals are shown VAT inclusive — worth knowing before you compare against a gallery in another jurisdiction.
5. Ask before you commit. For anything above a poster price, the questions below matter.

Questions to ask before buying

• Is it an original or a reproduction? An original painting or drawing is unique; a print or poster is produced in multiples.
• If it is a limited edition, what is the edition size and number? "Limited edition" without a number tells you little.
• Is it signed, and how? A signature in the plate is not the same as a hand signature.
• What is included — frame, mount, certificate? Framing and shipping are frequently excluded and can change the total significantly.
• What does shipping cost, and to where? Studio 18's cart shows shipping as "To be determined" until checkout, so the final figure is not visible while browsing.
• What is the returns position? Ask directly; policies vary between galleries and between in-person and online purchases.

Practical etiquette and pitfalls

• In a physical gallery, ask before photographing. Policies differ, and flash can damage works on paper.
• Do not handle unframed works unless invited to. Oils from fingers are a real conservation problem.
• Treat "sale" labels as time-limited, not as a quality signal. Studio 18 marks several Derek Crow prints as Sale at £60 — a discount says something about pricing strategy, not about the work.
• Watch the currency. If you are buying from outside the UK, confirm whether the price you see is the price you pay after conversion and any card fees.
• Do not assume browsing equals buying. A gallery is a shop, but staff generally expect looking without obligation.

A quick way to decide

If you want to see art with no intention of buying, a public gallery or museum is the better fit. If you want to own something — a poster at £15, a limited edition print at £60, or an original — a commercial gallery like Studio 18 is built for exactly that, with artist pages, categories and a checkout. Start by browsing one category that matches your taste, check the medium and edition details, then ask the shipping and returns questions before you pay.

NASA's Global Modeling and Assimilation Office (GMAO) is the part of NASA's Earth science effort that builds global models of the Earth system and combines them with satellite and other observations through data assimilation. If you need research-grade atmospheric, land surface, ocean, or ozone fields — especially for subseasonal-to-decadal timescales — GMAO is a primary source. If you need a consumer weather forecast or a simple point-and-click local outlook, GMAO is not that; it produces the underlying model and reanalysis data that other services build on.

What GMAO actually does

GMAO's work sits at the intersection of two activities:

• Global modeling — running numerical models that simulate the atmosphere, land surface, ocean, and chemistry on a global grid over time.
• Data assimilation — merging those model simulations with real observations (largely satellite) to produce a physically consistent, gridded estimate of the Earth system state.

The assimilation step is what separates a reanalysis or analysis product from a pure forecast: observations constrain the model so the output stays anchored to what actually happened, while the model fills gaps where observations are sparse.

The main product areas

GMAO's stated scope covers several Earth system components. The table below maps each to what it typically means for a user.

If your question is "what did the atmosphere look like over a region last month" or "what does the model project for the coming season," these categories tell you which product family to look in.

How to access GMAO data and documentation

GMAO publishes its research, model descriptions, and data products through its site at gmao.gsfc.nasa.gov. A practical path:

1. Start with the research/product pages to identify which model or dataset matches your variable and time range.
2. Read the documentation for that product — resolution, time span, and known biases determine whether it fits your use case.
3. Download or query the data through the access method the product page specifies.
4. Validate against your own observations before relying on it, since reanalysis and model fields carry resolution and bias limitations.

The site is documentation- and research-oriented, so expect to read product descriptions rather than find a single unified download button for everything.

When GMAO fits your work — and when it doesn't

Good fit:

• You need gridded global fields for research, model evaluation, or downstream processing.
• You work on subseasonal-to-decadal timescales or Earth system components like land, ocean, or ozone.
• You can handle scientific data formats and read documentation.

Poor fit:

• You want a ready-made local forecast for planning your day — use a consumer weather service instead.
• You need a guaranteed, plug-and-play API with no setup.
• You need commercial support or a service-level guarantee; GMAO is a NASA research operation.

Common limitations to plan for

• Resolution and bias. Global model and reanalysis fields are gridded estimates, not point measurements. Local accuracy varies.
• Documentation-dependent use. Correct interpretation requires reading the product notes; using a field without checking its time span or version can lead to wrong conclusions.
• Research orientation. Access methods and formats assume a technical user.

If your task is research or development that needs global, physically consistent Earth system data, GMAO is worth checking first. If your task is a quick local forecast, look elsewhere.