Tycho Brahe in front of his house in Copenhagen. Tycho Brahe left Hven in 1597, bringing some of his instruments with him to Copenhagen, and entrusting others to a caretaker on the island. Shortly before leaving, he completed his star catalogue giving the positions of 1,000 stars. After some unsuccessful attempts at influencing the king to let him return, he finally acquiesced to exile, but he wrote his most famous poem "Elegy to Dania" in which he chided Denmark for not appreciating his genius. The instruments he had used in Uraniborg and Stjerneborg were depicted and described in detail in his book
HEAT 1X Tycho Brahe successful tests of the solid fuel epoxy and the liquid oxidizer nitrous oxide, which was used in their hybrid rocket HATV ("Hybrid Atmospheric Test Vehicle"). The HATV rocket was only 1/3 size of the final rocket, HEAT. This HEAT rocket ("Hybrid Exo Atmospheric Transporter") with liquid oxygen and polyurethane, would carry the MSC ("the micro-spacecraft") above the 100 km boundary and into space. The MSC was named after Tycho Brahe, and the combination was known as the HEAT-1X TYCHO BRAHE. Gravity would then pull the MSC back to the atmosphere, where the MSC landed on water using parachutes. The first