Sukidesu, Sensei
ch 1; 5: teacher x student, age gap, older uke, reencounter, school life, basketball ch 2-3: unrequited love, age gap, stars ch 4: childhood friends, reencounter, shoes, running, injury, photographer
Kimi Ga Terasu Koi No Hikari
Hoshi ni Negattari Nanka Shinai
ch 1-2: school life, studetn x student, astronomy club, stars, sleeps when it gets dark, cute, pure love, sweet ch 3-6: childhood friends, reencounter, sick, illness, school life, planetarium, stars, astronomy club
17 Seito
ch 13.5 it is prequel to: https://www.mangaupdates.com/series.html?id=146663 raws of its sequel: https://www.nicoobook.com/archives/528497.html
After Staring at the Starry Sky
ch 6.5, 6.1, 6.5, extra, vol 2 ch 5.5
Stellarium