Life is everywhere in the universe if one understands cosmic ancestry, panspermia, and the infinity of time. So one may ask why have we not been contacted? But we have. By many different beings. Here is one that is easy to prove:
The events at Fátima in 1917 regarding Our Lady of Fátima, and the dozens if not hundreds of similar phenomena which have occurred throughout history — in the written record, in those events preserved as symbols in stone from the earliest times, and especially paintings from more recent times — cannot be anything other than continual contact with one or more extraterrestrial beings. In particular, based on the accounts, a feminine one carrying some kind of message or warning for the people of the time. Nothing about these events can be confused with some kind of natural phenomena, the recurrence of an exact image to both kids and adults in different eras is not natural.
Let's start with the paintings of The Tiburtine Sibyl:
Augustus asked the Sibyl whether he should be worshipped as a god, as the Roman Senate had ordered. She replied by showing him a vision of a young woman with a baby boy, high in the sky, while a voice from the heavens said "This is the virgin who shall conceive the saviour of the world" Wiki.
La Sibylle de Tibur by Antoine Caron (1575 / 1580)
Note the Phrygian Caps worn by those below her image on the right. Where these the Galli or Atti of Cybele? Also remember that Rome imported the worship of Kybele (Cybele, or Magna Mater) from Phrygia where some of their Trojan ancestors were said to have been born.
On observing the symbols of Kybele --- perhaps even linked to Kubaba, Ishtar and Isis --- some are always present: surrounded by a light, brighter than the sun, beams or rays clear as glass (Star of Ishtar?), a crown of towers or barbs above which hover stars, a robe of white or pink, with a blue sash, some kind of creatures or beings which are not quite alive more like machines or devices (pictured as lions or the faces of cherubim), in her hands she either holds a tambourine or prayer beads (Rosary), or has hands in prayer. In most cases she is seen descending from the sky or is hovering above in the air or off the ground.
In certain images, the ones shown here, she is standing on either a sphere or a crescent shaped metallic object. And typically included is a snake, on which she stands.
One more (of several others) of the event with Augustus:
The Tiburtine Sibyl meets Augustus
Examples in the Form of Visions of the Virgin aka Mary the Madonna.
Saint John on Patmos, ca. 1511 by Hans Baldung
Apparition of the Virgin to St. Catherine Laboure (1806-76) 31st July 1830, 1835 by Le Cerf
St. James the Great sees a vision of the Virgin Mary at Saragossa, Belgian School - Amidon Remy
Inmaculada con Miguel del Cid by Francisco Pacheco
The Virgin of the Apocalypse by Miguel Cabrera
Glorification of the Immaculate Conception by Francisco Antonio Vallejo
The Immaculate Conception by Diego Velazquez
The Glorification of the Virgin, 1490, by Geertgen tot Sint Jans
The Immaculate Conception (1767–1769) by Giovanni Battista Tiepolo
Another of her symbols — shown in The Secret Teachings of All Ages by Manly P. Hall, under Mater Syriae, above her right hand — is the luminous fire-balls aka meteorites. These objects, more generally the comets, contain and spread the seeds of life across the universe. Like the female which gives forth the life bearing seeds to continue the unbroken chain of life, so the meteorite represents the female essence. No wonder the meteorite was encased in silver and used to represent her oris.
QED.