# Exoplanet discovery facilities — Meplar visual revision 2

Kepler and K2 account for 3,337 of 6,445 confirmed planet records (51.8%) in the fixed 12 October 2026 NASA Exoplanet Archive extract. Kepler: 2,787 (43.2%); K2: 550 (8.5%); other 71 recorded facility labels: 3,108 (48.2%). Shares are rounded independently.

The two count bars share a zero baseline and linear scale. The first splits the Kepler and K2 categories. The bar lengths deliberately show a narrow majority, not an overwhelming lead. Both groups are out of the same 6,445-record denominator. Categories are recorded discovery-facility labels, not exclusive scientific credit or survey-efficiency measures.

## Full interpretation

The two highlighted labels together contain more confirmed planet records than the other 71 labels combined. TESS, with 1,008 planets, is the largest of those other categories. The file has no exposure-time or target-star denominator and includes confirmed planets rather than candidates or observing attempts. It cannot establish which survey is most efficient or most complete. The companion page retains this useful interpretation, exact sources and detailed limitations.

## Reproduce offline

Extract reproduction.zip. With Python and Matplotlib 3.9.4, run `python3 scripts/build_charts.py`. The unchanged frozen exoplanets.csv is included under sources/. No network fetch occurs. Existing macOS Arial fonts are used, or set MEPLAR_FONT_REGULAR and MEPLAR_FONT_BOLD to installed TrueType font paths. No font is redistributed. Main output is a 1440×1920 PNG plus outlined SVG. checks/exoplanet-390.png is an actual 390×520 raster. Essential labels are at least 14.08px at 390px, values 16.25px, credit 10.83px.

## Source and reuse

This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program.

Archive overview: Christiansen et al. (2025), The Planetary Science Journal, https://doi.org/10.3847/PSJ/ade3c2 . Retain acknowledgement and citation guidance: https://exoplanetarchive.ipac.caltech.edu/docs/acknowledge.html . Public downloadable factual fields only; no survey images, light curves, papers or third-party artwork. No blanket CC0 licence is asserted. Original Meplar charts/code are separate works; no source endorsement is implied.

Source snapshot: 12 October 2026. Original query: select pl_name,discoverymethod,disc_year,disc_facility from ps where default_flag=1 . TAP: https://exoplanetarchive.ipac.caltech.edu/TAP/sync . No new source download was made for this revision. The unchanged source CSV SHA256 is 3808dd59c98eddea3113d833360c5fbc6db07bf50a0541f54819dbdea98e7ac0.

Data/definitions: facility_counts.csv contains all 73 recorded categories; chart_data.csv contains the three displayed components. Every unique planet is counted once. Each share is count/6,445×100. The main and thumbnail graphics are not a time-series discovery-rate comparison; recorded discovery years range 1992–2026 and 2026 is partial.

Tools and affiliation: Python/csv/Decimal and Matplotlib. Original Meplar analysis and design with AI assistance from ChatGPT/Codex. I run Meplar. No paid assets or source endorsement.