Yenra Astronomy

WISE: How to Explore an Infrared Sky Survey

Yenra — Wed, 09 Dec 2009 05:00:00 GMT

Find WISE archive images, compare infrared bands, choose between coadds and single exposures, and recognize common artifacts.

Published: 2009-12-09. Updated: 2026-09-30.

Radio Telescope Antennas: How Arrays Make an Image

Yenra — Wed, 25 Nov 2009 05:00:00 GMT

Understand baselines, resolution, sensitivity and missing spatial scales, then read an ALMA image with the right context.

Published: 2009-11-25. Updated: 2026-09-30.

Nancy Grace Roman Space Telescope: How to Follow and Interpret Its Results

Yenra — Thu, 10 Sep 2026 04:00:00 GMT

Follow Roman mission updates, understand its surveys and planet detections, and evaluate the evidence, calibration and uncertainty behind its results.

Published: 2026-09-10.

James Webb Space Telescope: How to Read Its Images and Spectra

Yenra — Sun, 20 Dec 2015 05:00:00 GMT

Read Webb image colors, filters, scale bars and spectra, and trace an astronomical claim back to its observation.

Published: 2015-12-20. Updated: 2026-09-10.

Enceladus: What Its Plumes Reveal About an Ocean World

Yenra — Fri, 10 Mar 2006 05:00:00 GMT

Connect Cassini's plume measurements with ocean evidence, phosphorus and chemical energy, while distinguishing habitability from life detection.

Published: 2006-03-10. Updated: 2026-09-10.

Comets: What You See and How to Plan an Observation

Yenra — Fri, 07 Jan 2005 05:00:00 GMT

Understand comet tails and brightness, use an ephemeris for your location, and plan a realistic night-sky observation.

Published: 2005-01-07. Updated: 2026-09-10.

Infrared Telescopes: Wavelengths, Thermal Background and What Images Reveal

Yenra — Wed, 12 May 2004 04:00:00 GMT

Compare infrared observations through wavelength, sensitivity and resolution, with examples from VISIR and Webb.

Published: 2004-05-12. Updated: 2026-09-10.

Europa: Ocean Evidence, Ice-Shell Questions and Europa Clipper

Yenra — Fri, 24 May 2002 04:00:00 GMT

Follow the evidence for Europa's ocean, understand ice-thickness uncertainty, and see which questions Europa Clipper can address.

Published: 2002-05-24. Updated: 2026-09-10.