The compact Nanosatellite was designed and developed to carry out Atmospheric analysis by creating a step forward to enhance low-cost CubeSat platforms for Environmental monitoring. The modular 6u CubeSat prototype was designed by considering size and weight constraints for my Nanosatellite (weighs <10kg) application. The standard dimensions for 6u CubeSat are 20x10x34.05 in cm. This work focuses on conducting atmospheric analysis by measuring critical parameters such as temperature, pressure, humidity, air quality, and many other factors, which offers many insights into Environmental Research and Atmospheric conditions. The subsystems involved, i.e., The Arduino R4 Wi-Fi, a Microcontroller, and Raspberry Pi 5, a Microprocessor, worked together as on-board computer subsystems to retrieve data from multiple Sensors and scientific instruments, which are integrated into the payload region of CubeSat. The Lora WAN development module operating in the 865-868 MHz frequency range is equipped to engage telemetry and communication subsystem, paired with a custom-designed turnstile antenna deployment system, which allows reliable long-range communication for CubeSat to communicate with the ground station. The CubeSat is structured using lightweight PETG material, with components manufactured through 3D printing, and also equipped with deployed solar panels, which play a vital role in the electronic power supply subsystem to ensure continuous power supply to the CubeSat. Integrating all these subsystems into 6u CubeSat, i.e., a compact nanosatellite that provides a facilitated platform for Atmospheric Research and Remote sensing Applications, will contribute to more innovations in Earth and Space science Applications.