Disadvantages of In-Office Whitening. 1  In-office bleaching is more expensive than take-home alternatives. 2  Its cost, on average, is $650, compared to $400 for take-home trays and under $100 for over-the-counter bleaching trays or whitening strips.
Planetary protection is a guiding principle in the design of an interplanetary mission, aiming to prevent biological contamination of both the target celestial body and the Earth in the case of sample-return missions.
Ensuring Planetary Protection is based on the legal obligations of our Member States as signatory of the UN Outer Space Treaty. Based on the ESA Planetary Protection Policy, ESA acts on behalf of its Member States ensuring their treaty obligations are met for all missions the Agency is flying or contributing to.