On This Day

NASA's Dawn space probe enters orbit around the protoplanet Vesta

Dawn is a retired space probe that was launched by NASA in September 2007 with the mission of studying two of the three known protoplanets of the asteroid belt: Vesta and Ceres.

Dawn is a retired space probe that was launched by NASA in September 2007 with the mission of studying two of the three known protoplanets of the asteroid belt: Vesta and Ceres. In the fulfillment of that mission—the ninth in NASA's Discovery Program—Dawn entered orbit around Vesta on July 16, 2011, and completed a 14-month survey mission before leaving for Ceres in late 2012. It entered orbit around Ceres on March 6, 2015. In 2017, NASA announced that the planned nine-year mission would be extended until the probe's hydrazine fuel supply was depleted. On November 1, 2018, NASA announced that Dawn had depleted its hydrazine, and the mission was ended.

Historical Significance

Dawn is a retired space probe that was launched by NASA in September 2007 with the mission of studying two of the three known protoplanets of the asteroid belt: Vesta and Ceres.

Events Before

  1. New FINA rules re competition swimsuits come into effect; all body-length swimsuits banned; men's suits to maximally cov

    New FINA rules re competition swimsuits come into effect; all body-length swimsuits banned; men's suits to maximally cover from the waist to knee, and women's from shoulder to knee; fabric must be a "textile" or woven material

  2. Earthquake devastates Haiti, killing an estimated 100,000 to 160,000 people and destroying the majority of the capital P

    Earthquake devastates Haiti, killing an estimated 100,000 to 160,000 people and destroying the majority of the capital Port-au-Prince

  3. "Easy Rider" director and actor Dennis Hopper (73) divorces his fifth wife Victoria Duffy due to irreconcilable differen

    "Easy Rider" director and actor Dennis Hopper (73) divorces his fifth wife Victoria Duffy due to irreconcilable differences and out-of-control spending

  4. Infanta Elena, Duchess of Lugo (46) divorces Lord of Tejada, Jaime de Marichalar (46) after 15 years of marriage

    Infanta Elena, Duchess of Lugo (46) divorces Lord of Tejada, Jaime de Marichalar (46) after 15 years of marriage

  5. Alexandre Bilodeau wins the gold medal in the freestyle skiing men's moguls event, becoming the first Canadian to win go

    Alexandre Bilodeau wins the gold medal in the freestyle skiing men's moguls event, becoming the first Canadian to win gold during an Olympic Games hosted in Canada

Events After

  1. Actress Parminder Nagra files for divorce from photographer James Stenson due to irreconcilable differences after 3 year

    Actress Parminder Nagra files for divorce from photographer James Stenson due to irreconcilable differences after 3 years of marriage

  2. American actor Dick Van Dyke (86) weds second wife, American make-up artist Arlene Silver (40) in Malibu, California

    American actor Dick Van Dyke (86) weds second wife, American make-up artist Arlene Silver (40) in Malibu, California

  3. "Twilight" actor Peter Facinelli (38) divorces "Beverly Hills 90210" actress Jennie Garth (39) due to irreconcilable dif

    "Twilight" actor Peter Facinelli (38) divorces "Beverly Hills 90210" actress Jennie Garth (39) due to irreconcilable differences after 11 years of marriage

  4. Actress and model Heidi Klum (39) divorces British soul and R&B singer-songwriter Seal (49) due to irreconcilable differ

    Actress and model Heidi Klum (39) divorces British soul and R&B singer-songwriter Seal (49) due to irreconcilable differences after almost seven years of marriage

  5. "The Lion King" becomes highest grossing Broadway show, overtaking "The Phantom of the Opera"

    "The Lion King" becomes highest grossing Broadway show, overtaking "The Phantom of the Opera"

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Frequently Asked Questions

What happened on July 16, 2011?
Dawn is a retired space probe that was launched by NASA in September 2007 with the mission of studying two of the three known protoplanets of the asteroid belt: Vesta and Ceres. In the fulfillment of that mission—the ninth in NASA's Discovery Program—Dawn entered orbit around Vesta on July 16, 2011, and completed a 14-month survey mission before leaving for Ceres in late 2012. It entered orbit around Ceres on March 6, 2015.
Why is NASA's Dawn space probe enters orbit around the protoplanet Vesta significant?
Dawn is a retired space probe that was launched by NASA in September 2007 with the mission of studying two of the three known protoplanets of the asteroid belt: Vesta and Ceres.

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