A celebrity, also referred to as a celeb in popular culture, is a person who has a prominent profile and commands a great degree of public fascination and influence in day-to-day media. The term is synonymous with wealth (commonly denoted as a person with fame and fortune), implied with great popular appeal, prominence in a particular field, and is easily recognized by the general public.

Various careers within the fields of sports and entertainment are commonly associated with celebrity status. These fields have produced prominent figures within these two industries. Many professional athletes have risen to fame such as golfer Tiger Woods, former boxer Muhammad Ali, football player Tom Brady, hockey player Wayne Gretzky, and basketball player Michael Jordan. Prominent entertainment figures have also reached celebrity status such as models Sofia Vergara, Gisele Bündchen, and Adriana Lima, authors J.K. Rowling of Harry Potter and Stephenie Meyer of Twilight, pop singers Britney Spears, Taylor Swift, Miley Cyrus and Justin Bieber, rappers Eminem, Jay-Z, Tupac Shakur, Biggie Smalls, Drake, Lil Wayne and Kanye West, musicians Jimi Hendrix, Bob Dylan, Elvis Presley, John Lennon, Paul McCartney, Mick Jagger, artists Damien Hirst, Salvador Dali, Pablo Picasso, Andy Warhol, Lucien Freud, radio personalities Don Imus and Howard Stern, political pundits and infotainers Bill O'Reilly, Ann Coulter, Bill Maher, Jon Stewart, Rush Limbaugh, and Glenn Beck, television talk show hosts Barbara Walters, Larry King and Oprah Winfrey, movie actresses Julia Roberts, Demi Moore, and Jessica Alba, television actors Charlie Sheen and Ashton Kutcher, national television correspodents Anderson Cooper, Katie Couric, and Meredith Viera or comedians Ellen Degeneres, Joan Rivers, Jay Leno and George Lopez.

The universe is commonly defined as the totality of everything that exists, including all matter and energy, the planets, stars, galaxies, and the contents of intergalactic space. Definitions and usage vary and similar terms include the cosmos, the world and nature. Scientific observation of earlier stages in the development of the universe, which can be seen at great distances, suggests that the universe has been governed by the same physical laws and constants throughout most of its extent and history. There are various multiverse theories, in which physicists have suggested that our universe might be one among many universes that likewise exist.

Throughout recorded history, several cosmologies and cosmogonies have been proposed to account for observations of the universe. The earliest quantitative geocentric models were developed by the ancient Greek philosophers. Over the centuries, more precise observations and improved theories of gravity led to Copernicus's heliocentric model and the Newtonian model of the Solar System, respectively. Further improvements in astronomy led to the realization that the Solar System is embedded in a galaxy composed of billions of stars, the Milky Way, and that other galaxies exist outside it, as far as astronomical instruments can reach. Careful studies of the distribution of these galaxies and their spectral lines have led to much of modern cosmology. Discovery of the red shift and cosmic microwave background radiation revealed that the universe is expanding and apparently had a beginning.^{[citation needed]}

Serena Jameka Williams (born September 26, 1981) is an American professional tennis player and a former world no. 1. The Women's Tennis Association has ranked her world no. 1 in singles on five separate occasions. She became the world no. 1 for the first time on July 8, 2002 and regained this ranking for the fifth time on November 2, 2009. She is the only female player to have won over $35 million in prize money.

Her 27 Grand Slam titles places her ninth on the all-time list: 13 in singles, 12 in women's doubles, and 2 in mixed doubles. She is the most recent player, male or female, to have held all four Grand Slam singles titles simultaneously and only the fifth woman in history to do so. She was also the first woman, along with sister Venus Williams, to hold all four Grand Slam doubles titles simultaneously since Martina Hingis did so in 1998. Her 13 Grand Slam singles titles is sixth on the all-time list. Williams ranks fourth in Grand Slam women's singles titles won during the open era, behind Steffi Graf (22 titles) and Chris Evert and Martina Navratilova (18 titles each). She has won more Major titles in singles, doubles, and mixed doubles than any other active player, male or female.