A Taste of Home in Orbit
Imagine floating 400 kilometres above Earth and sitting down for a meal of chicken biryani, dal chawal, or aalu paratha. For India's Gaganyaan crew, this will be a reality. The Defence Food Research Laboratory (DFRL) in Mysuru has been tasked with creating
a menu that offers a touch of home in the vastness of space. The list includes familiar favourites like idli, upma, vegetable pulav, and even moong dal halwa for dessert. This carefully curated selection of around 30 to 50 dishes is designed not just for sustenance but to provide a comforting and familiar experience for the astronauts during their mission. The menu features both vegetarian and non-vegetarian options, ensuring the crew has variety and choice.
The Science of a Space Diet
Feeding an astronaut is far more complex than packing a lunchbox. In the microgravity environment of space, the human body undergoes significant changes. Astronauts are at risk of losing bone density and muscle mass, so their diet must be precisely calibrated to counteract these effects. A typical astronaut requires between 1,900 and 3,200 calories per day, depending on their size and workload. The diet must be rich in calcium and Vitamin D to support bone health. Protein intake is also critical for maintaining muscle, but it's a delicate balance, as too much protein can potentially accelerate calcium loss. Every meal is part of a larger strategy to keep the crew healthy and performing at their peak.
No Crumbs Allowed
Preparing and eating food in space presents unique engineering challenges. Food must be lightweight and compact to save precious cargo space. It also needs a long shelf life without refrigeration. Most importantly, it must be virtually crumb-free. In zero gravity, floating crumbs could be inhaled by an astronaut or clog critical equipment. This is why bread is often avoided in favour of tortillas on the International Space Station. For Gaganyaan, the DFRL is using processes like thermostabilisation (heat treatment) and irradiation to preserve the food in special ready-to-eat packages. Many items will be dehydrated and will need to be reconstituted with water using specially designed dispensers and straws that prevent liquids from escaping.
Why Food Tastes Different in Space
Many astronauts report that food tastes blander in orbit. This isn't because the food itself has changed, but because their sense of taste has. In microgravity, bodily fluids shift upwards, causing a stuffy-headed feeling similar to having a cold, which dulls the sense of smell and, consequently, taste. To combat this, space food is often made spicier or more flavourful than its Earth-bound equivalent. The DFRL has noted that the Gaganyaan menu will be mildly spiced, but astronauts will have the option of adding spice sachets to tailor the flavour to their preference, ensuring the meals remain enjoyable.
More Than Just Fuel
Beyond pure nutrition, food plays a vital psychological role during space missions. For crews living in isolated and confined environments for extended periods, mealtimes are important social rituals that help build camaraderie. Familiar foods can boost morale and reduce the stress and monotony of spaceflight. Having access to dishes like biryani or idli sambar connects the Indian astronauts to their culture and home, providing a sense of normalcy and comfort millions of miles away. This psychological boost is considered essential for maintaining the crew's well-being and ensuring mission success.
