Angel Probes

Speculation: Likely to make an appearance in CSP
 * Angel 1

Or maybe this is the Sparkle drive test probe. ESA-58
 * Angel 2

a metal thing about the size of a small bus

Launched sol 111

Instruments:

a meter monitoring the drain on the object’s electric and mana batteries.

A camera that takes many pictures

Radio

Thermometer

Sparkle-drive

Misc Science equipment. successful round-trip dimensional hops. This gave the Equestrians a false sense of security, particularly since two of those five were emergency returns from low-magic worlds. The sixth trip ended less than a minute after arrival in the new universe when the local Queen Nightmare Moon sensed an intruder in her eternal night and snuffed it out.
 * Angel 3 made five

Angel 4 likewise returned five times successfully from interuniversal jaunts, only one of which came from an emergency abort. Unfortunately its sixth jump landed it in a universe that had no magic at all in its laws of physics, and it ceased operating instantly, trapped in a solar orbit millions of miles from the nearest planet, never to be seen again.

Angel 5 returned safely from its maiden jaunt. On its second trip, unfortunately, it was detected by Empress Twilight Twinkle of that universe, who used her magic to teleport it to herself, deactivate it, and then to carefully disassemble it for proper study. Unfortunately when she reassembled it the probe no longer remembered how to return home, and so it remained in that universe, sparking another Equestria’s exploration of the stars.

Angel 6 proved the workhorse of the lot. It returned home seven times, twice due to emergency abort. Once it even detected radio signals from the third planet from the star, but not from the fourth. Sadly, on its eighth voyage it appeared in the midst of a fleet of alien invaders, who swatted the little robot ship like a fly before resuming their campaign of experimentation on humanity.

And Angel 7 launched, reached what had been considered safe operating distance from Equus, and took its first- and last- dimensional hop. The ponies never saw it again. Neither did anyone else. It popped back into existence mere meters above the surface of the moon, and a second later it was nothing but metal confetti strewn across the newest of its millions of craters. Almost not created after the failure of the last 6. But, after failing to locate by trace magic acros crystal link, They went ahead with the program.
 * Angel 8

Disappeared during 3rd hop. Programmed for a narrower band of worlds.

Ended up in equestria girls custody. Practically Identical to Angel 8 Angel 2 is produced by ESA.
 * Angel 9
 * Angel 10
 * Angel 11

Starting from angel 3, They are produced by CSP