Star Bright

Star Bright is the placeholder name of a male unicorn with a gray coat, two-tone pale blue mane, amber eyes, and a cutie mark of a telescope.

Design
Star Bright is identical to "Sightseer" in all but pony kind and eye color, shares his tail style, coat and eye colors, cutie mark, and occasionally neckwear with "Star Gazer", shares his mane and tail style, cutie mark, and sometimes eye color with Starry Eyes, shares his design with Royal Pin, "Ponet", "Poppycock", and S02E26 Unnamed Unicorn Stallion #4, shares his mane and tail style with Compass Star and "The Tenth Doctor / Doctor Whooves #3", shares his tail style and eye color with Perfect Pace, "Raggedy Doctor", S04E19 Unnamed Earth Stallion #1, and "Infinity", and shares his tail style with "Emerald Beacon", "Madden", and S04E17 Unnamed Earth Stallion #4.

Depiction in the series
Star Bright first appears in Sweet and Elite as a spectator at the Wonderbolts Derby. He appears at Applejack's send-off party in The Last Roundup, in Ponyville when Cerberus appears in It's About Time, and at the second wedding ceremony in A Canterlot Wedding - Part 2.

In season three, either Star Bright or "Sightseer" appears on the Ponyville-bound Friendship Express in Just for Sidekicks.

In season four, Star Bright watches the goof-off between Pinkie Pie and Cheese Sandwich in Pinkie Pride and the Cutie Mark Crusaders' play in For Whom the Sweetie Belle Toils. He also appears several times at the Rainbow Falls Traders Exchange in Trade Ya! and as an Equestria Games spectator in Equestria Games. In Twilight's Kingdom - Part 1, he is among multiple other unicorns to have their magic taken by Lord Tirek.

In season five, Star Bright attends the Grand Equestria Pony Summit in Princess Spike, attends the Ponyville friendship party in Party Pooped, shares donuts with a mare in Joe's donut shop in Amending Fences, attends the grand opening of Canterlot Carousel in Canterlot Boutique, and watches the Wonderbolts practice in Rarity Investigates!

Appearances
Times are approximate.