| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | Last year's cycle (2026): $5,518; 2027: Unconfirmed — check official site | Unconfirmed — check official site | $3,445–$7,195 (2027 cycle) |
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| Financial aid | Last year's cycle (2026): 2026 need-based application and program assistance: Up to $5,564. Could assist with the $46 application fee and $5,518 program cost based on family income, family size and available funds; actual award not guaranteed.; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Last year's cycle (2026): Early new-enrollment tuition discount: $500. For new 2027 Teen Summer Trip enrollment by August 31, 2026; this is a discount, not a cash award.; Conditional alumni, sibling and educator discounts: Amount: Unconfirmed — check official site. Published rates are 20% alumni by August 31, 5% sibling and 10% educator, subject to eligibility and program terms.; 2027: Unconfirmed — check official site |
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| Expenses and aid conditions | Last year's cycle (2026): 2026 COSMOS application fee: $46. Nonrefundable; pending fee-waiver review could change when or whether payment was required.; Credit-card transaction fee on program payments: Amount: Unconfirmed — check official site. Approximately 2.5% when paying program costs by credit card; application fee exempt.; 2026 need-based application and program assistance: Up to $5,564. Could assist with the $46 application fee and $5,518 program cost based on family income, family size and available funds; actual award not guaranteed.; Full-financial-aid attendance deposit: $200. Required only for admitted students offered full aid and refunded to the legal guardian after successful completion.; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Last year's cycle (2026): Application fee: $95. Nonrefundable.; Teen Summer Trip enrollment deposit: $700. Applied under enrollment terms; refundable through December 31, 2026 for early 2027 enrollment, then subject to cancellation rules.; Program accommodation: Amount: Unconfirmed — check official site. Included in tuition; accommodation type varies by itinerary.; Three program meals daily: Amount: Unconfirmed — check official site. Included in tuition; airport meals before and after the trip are excluded.; Round-trip airfare and excluded travel costs: Amount: Unconfirmed — check official site. Airfare is not included. Passport, visa, baggage, airport transfer and insurance expenses may also apply.; Early new-enrollment tuition discount: $500. For new 2027 Teen Summer Trip enrollment by August 31, 2026; this is a discount, not a cash award.; Conditional alumni, sibling and educator discounts: Amount: Unconfirmed — check official site. Published rates are 20% alumni by August 31, 5% sibling and 10% educator, subject to eligibility and program terms.; 2027: Unconfirmed — check official site |
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| Stipend or pay | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Eligibility | Grades 9–12 (provider uses rising grades) | Grades 9–12 when applying; check the provider's rules for graduating seniors | Grades 9–12; Grade timing: Unconfirmed — check official site |
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| Additional eligibility | Residency: Attend high school in person in California; Requirement: Be rising into grade 9, 10, 11 or 12 for the program fall year; Requirement: Attend high school in person in California; Requirement: Demonstrate academic excellence and preparation for the selected STEM cluster; Requirement: Complete cluster-specific course prerequisites; Requirement: Live on the host UC campus for the full program; Requirement: Be a first-time COSMOS participant; Exclusion: Students not attending a California high school in person; Exclusion: Students who previously attended any COSMOS program; Exclusion: Applicants outside the rising-grade 9-12 range; Exclusion: Applicants unable to live on campus for the full program; Exclusion: Late application, supporting, payment or admission materials; Exclusion: Assuming a 3.5 GPA is an absolute statewide minimum rather than the published typical profile | Citizenship: Historical 2026 rule: International students may attend subject to U.S. entry requirements; Requirement: Historical 2026 rule: Be currently enrolled in grade 9, 10, 11 or 12 when registering; Requirement: Historical 2026 rule: Submit a motivation essay or approved alternative-media statement if new; Requirement: Historical 2026 rule: Submit exactly two accepted forms of academic or talent-area evidence if new; Requirement: Historical 2026 rule: Meet at least two documented gifted/talent indicators; Requirement: Historical 2026 rule: Live under Purdue's supervised residential-camp rules; Exclusion: Historical 2026 rule: The $1,495 rate applies to a different residential/commuter track, not PULSAR; Exclusion: Historical 2026 rule: Returning students are exempt from the essay and qualifying documentation; Exclusion: Historical 2026 rule: Admission and first-choice course placement are not guaranteed; Exclusion: Historical 2026 rule: International participants arrange and pay for their own transportation and immigration compliance | Requirement: Entering grade 9 through graduating grade 12 for high-school trips; Requirement: Meet selected itinerary's health, mobility, conduct and travel requirements; Requirement: Submit health history and licensed-physician exam; Requirement: Obtain passport, visa and destination entry documents when required; Requirement: Parent or guardian completes under-18 enrollment and releases; Exclusion: Middle-school trips are separate products; Exclusion: Trip acceptance and safe participation remain subject to health, conduct, documentation and capacity review; Exclusion: Not every trip offers the same service, language or academic experience |
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| Session dates or duration | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Catalog terms: 1–3 weeks; 2027: Unconfirmed — check official site |
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| Format | In person | Unconfirmed — check official site | In person |
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| Housing and supervision | Residential. Supervision and housing details: Unconfirmed — check official site | Unconfirmed — check official site | Residential. Supervision and housing details: Unconfirmed — check official site |
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| Location | Davis, California, Irvine, California, Los Angeles, California, Merced, California, San Diego, California, Santa Cruz, California, UC Davis, UC Irvine, UCLA, UC Merced, UC San Diego, UC Santa Cruz | Unconfirmed — check official site | Program-specific international and U.S. territory itineraries; current departures use Houston, New York, Miami or self-booked flights |
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| Selection and application | Selection: Each of six campuses accommodates roughly 160-200 students, and clusters typically enroll 20-25 with a commonly reported 5:1 student-to-faculty ratio. Admissions are competitive and based on academic merit relative to the selected topic, but applicant count and statewide acceptance rate were not published. Application materials: One personal statement; One required teacher recommendation, with two recommended | Selection: The 2026 application documented gifted/talent indicators and course placement depended on eligibility and availability. Confirm the next-cycle process; no acceptance rate is published. Application materials: Historical 2026 instructions: One-to-two-page motivation essay or alternative media statement for new students; Historical 2026 instructions: Exactly two qualifying documents from transcript, IQ testing, achievement testing, teacher/mentor recommendation or talent-involvement documentation | Selection: Capacity- and fit-based enrollment rather than a single selective cohort. A completed application and payment reserve a space subject to trip availability, documentation, health and conduct requirements. |
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| Official sources | Source 1 · checked 2026-08-22Source 2 · checked 2026-08-22Source 3 · checked 2026-08-22Source 4 · checked 2026-08-22Source 5 · checked 2026-08-22Source 6 · checked 2026-08-22Source 7 · checked 2026-08-20 | Source 1 · checked 2026-10-12 | Source 1 · checked 2026-08-22Source 2 · checked 2026-08-22Source 3 · checked 2026-08-22Source 4 · checked 2026-08-20 |
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