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Welcome to Space to Ground. I'm Leah Cheshier.  This week, a Dragon arrived to the space station for a month-long stay.

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On May 4th, SpaceX launched their 17th commercial resupply mission to the space station.

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This Dragon capsule which flew to the station once before on

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SpaceX's 12th resupply mission, arrived to the orbiting laboratory on May 6 bringing with it about

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5500 pounds of supplies.

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Canadian Space Agency astronaut David Saint-Jacques commanded the

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Canadarm2 to grapple the spacecraft, then ground controllers birthed the vehicle to the station's Harmony module where it will remain for about a month.

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Astronauts will spend the next few weeks unpacking and reloading Dragon for an eventual safe splashdown.

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We know it's important to take our vitamins, and future astronauts might be getting them from an unexpected source.

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The MicroAlgae Study is looking at a tiny freshwater green algae that is capable of producing a powerful antioxident when stressed.

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Researchers believe

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exposing it to microgravity could stress the algae into producing this antioxident,

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which has been shown to support the immune system and could protect against the effects of Radiation Exposure, Eye Damage,

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Cardiovascular System Damage, and Bone Loss.

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Something like this could be a critical dietary boost as we send humans on longer and longer space missions and set our sights on returning

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astronauts to the moon by 2024.

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This week's question comes from Rene, who asks if Dragon is the sixth vehicle to dock at the space station and if there's room for

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any more.  As a matter of fact, there is.

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On Monday, Dragon became the sixth vehicle currently docked to the station,  joining Cygnus 11

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Soyuz 11 and 12, and Progress 71 and 72.

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One more parking spot will be available for Commercial Crew vehicles