Final answer:
Andromeda Galaxy is the closest large galaxy to the Milky Way, located 2 million light years away with observable features, making it the galaxy that Eo and Darrow see from the garden.
Step-by-step explanation:
The Andromeda Galaxy is the closest large galaxy to our own Milky Way and is a mere 2 million light years away from us. Described as having blue regions that harbor young, emerging stars and dark streaks of vast clouds of gas and dust, Andromeda's features are comparable to those of the Milky Way. The presence of a smaller satellite galaxy, visible in observations, highlights its place as a formidable neighbor in the cosmos. When considering the visibility of astronomical objects from Earth, the luminosity, distance, and cosmic interactions all offer insights into the wonders of our universe. Therefore, when Eo and Darrow look up into the night sky from their location in the garden, it is the Andromeda Galaxy they are likely to see, offering a fascinating glimpse into the vastness of space and the interconnectedness of gravitational forces within it.