double trouble

SELECT * FROM gallery2 WHERE topic_id="843629" UNION SELECT * FROM gallery2 WHERE topic_id="842866" UNION SELECT * FROM gallery2 WHERE topic_id="1580860" UNION SELECT * FROM gallery2 WHERE topic_id="827261" UNION SELECT * FROM gallery2 WHERE topic_id="634015" UNION SELECT * FROM gallery2 WHERE topic_id="1704582" UNION SELECT * FROM gallery2 WHERE topic_id="1521368" UNION SELECT * FROM gallery2 WHERE topic_id="36281" UNION SELECT * FROM gallery2 WHERE topic_id="1416561" UNION SELECT * FROM gallery2 WHERE topic_id="1359832" UNION SELECT * FROM gallery2 WHERE topic_id="1037044" UNION SELECT * FROM gallery2 WHERE topic_id="414483" UNION SELECT * FROM gallery2 WHERE topic_id="1030954" UNION SELECT * FROM gallery2 WHERE topic_id="353329" UNION SELECT * FROM gallery2 WHERE topic_id="298059" UNION SELECT * FROM gallery2 WHERE topic_id="612603"