Primes Primes by trial division in C Primes by sieve in C Primes by sieve in Commodore 64 Assembler Primes by sieve in Python Primes by sieve using wheel factorization in C Mersenne primes using the Lucas-Lehmer method in C Fermat’s Little Theorem in C Density of primes in Python Twin primes of arbitrary length…

Tucana

Galaxies, globular clusters, and double stars in the constellation Tucana

Observing Logs

Solar System Objects Sun Moon Mars Jupiter Saturn Uranus Pluto Minor Planets Aitken Double Star Catalogue Deep Sky Objects and Double Stars by Constellation Andromeda Aquarius Canes Venatici Cassiopeia Centaurus Cetus Hydrus Leo Orion Pisces Sagittarius Sextans Scutum Taurus Triangulum Tucana Ursa Major Vulpecula