I'm Petr. I live in Prague, and I have always wondered what is up there. So I built myself a simple app to find out. Friends and family liked it, and now it is on the App Store. I've built digital products my whole life, and one lesson always holds: feedback matters most. So please tell me what you think. I read every email. You can also find me on LinkedIn and Reddit.
Beltari shows tonight's sky from your place, with its stars, planets and constellations. It shows when the next meteor shower is and where to find a dark place to stargaze. Point your iPhone at the sky, and the app names the ones in front of you. Pick a night-sky photo in the app, and it names the bright stars in it.
Beltari is an iPhone app and a website.
Star names: IAU Working Group on Star Names. Constellation lines: d3-celestial, Olaf Frohn, BSD 3-Clause. Town names: GeoNames, CC BY 4.0. Night light data: NASA VIIRS Black Marble (VNP46A4), via LAADS DAAC. Sky darkness calibration: Globe at Night, NSF NOIRLab, CC BY 4.0.