an einstein-rosen bridge is a wormhole.
this is a time travel station schedule inspired by Carl Sagan's "Contact" intergalactic terminals. it is a snapshot of the known realm or space regional limits that humanity has nervously mapped out. each point in the travel route is a destination point within this chunk of universe.
the science is a bit involving so the design elements are reduced as it is intended for the general public. i had fun with the idea of such a schedule and making up what a traveler may need to know before treking the great nothing, such as loss of consciousness and unpredictable glitches in time.