RT @ESAGaia: Do you have a telescope? #GaiaMission calling for ground-based follow-up of a rare microlensing event: cosmos.esa.int/web/gaia/IoW_2… @gaia_alerts
RT @ESAGaia: Do you have a telescope? #GaiaMission calling for ground-based follow-up of a rare microlensing event: cosmos.esa.int/web/gaia/IoW_2… @gaia_alerts